View source for U.S. Route 1

{{Short description|North-south U.S. route from Florida to Maine}}
{{redirects here|US 1}}
{{Use mdy dates|date=January 2017}}
{{Use American English|date=January 2023}}
{{Infobox road
| country = USA
| type = US
| route = 1
| map = {{maplink|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=340|type=line|from=U.S. Route 1.map}}
| map_custom = yes
| map_notes = US&nbsp;1 highlighted in red
| length_mi = 2369.49
| length_ref = <ref name=AASHTO>{{cite book |author = American Association of State Highway and Transportation Officials |url = http://cms.transportation.org/?siteid=68&pageid=1760 |title = United States Numbered Highways |edition = 1989 |location = Washington, DC |publisher = American Association of State Highway and Transportation Officials |url-status = dead |archive-url = https://web.archive.org/web/20070204074242/http://cms.transportation.org/?siteid=68&pageid=1760 |archive-date = February 4, 2007 |author-link = American Association of State Highway and Transportation Officials}}</ref>
| established = November 11, 1926
| direction_a = South
| direction_b = North
| terminus_a = Fleming Street in [[Key West|Key West, FL]]
| junction = {{Plainlist|<!-- limit 10 junctions -->
*{{jct|country=USA|I|95}} in [[Miami|Miami, FL]]
*{{jct|country=USA|I|20}} near [[Aiken, South Carolina|Aiken, SC]]
*{{jct|country=USA|I|77}} in [[Columbia, South Carolina|Columbia, SC]]
*{{jct|country=USA|I|40}} in [[Raleigh, North Carolina|Raleigh, NC]]
*{{jct|country=USA|I|85|US|460}} near [[Petersburg, Virginia|Petersburg, VA]]
*{{jct|country=USA|I|64|I|95}} in [[Richmond, Virginia|Richmond, VA]]
*{{jct|country=USA|I|83}} in [[Baltimore, Maryland|Baltimore, MD]]
*{{jct|country=USA|I|76|dab1=Ohio–New Jersey}} in [[Philadelphia|Philadelphia, PA]]
*{{jct|country=USA|I|87|dab1=New York}} in [[New York City|New York, NY]]
*{{jct|country=USA|I|90|I|93}} in [[Boston|Boston, MA]]
}}
| terminus_b = {{Jct|province=NB|NB|161|NB|205}} at the [[Fort Kent–Clair Border Crossing]] in [[Fort Kent, Maine|Fort Kent, ME]]
| states = [[Florida]], [[Georgia (U.S. state)|Georgia]], [[South Carolina]], [[North Carolina]], [[Virginia]], [[Washington, D.C.|District of Columbia]], [[Maryland]], [[Pennsylvania]], [[New Jersey]], [[New York (state)|New York]], [[Connecticut]], [[Rhode Island]], [[Massachusetts]], [[New Hampshire]], [[Maine]]
| browse = {{Us browse|previous_type=US|previous_route=425|next_type=US|next_route=2|route=[[List of United States Numbered Highways|US]]}}{{New England browse|previous_route=32A|next_route=1A|route=[[File:New_England_1.svg|30px]]}}
}}
'''U.S. Route&nbsp;1''' or '''U.S. Highway&nbsp;1''' ('''US&nbsp;1''') is a major north–south [[United States Numbered Highway System|United States Numbered Highway]] that serves the [[East Coast of the United States]]. It runs {{convert|2,370|mi|km}} from [[Key West]], [[Florida]], north to [[Fort Kent, Maine]], at the [[Canada–United States border|Canadian border]], making it the longest north–south road in the United States.<ref name="Magic valley lists US&nbsp;1 as the longest US Route in the United States">{{cite web |title = America's longest north-south highways |url = http://magicvalley.com/america-s-longest-north-south-highways/article_f42f6adc-2084-5036-a39d-7487c860b9e1.html |work = Times-News |date = December 14, 2010 |access-date = October 13, 2014 |archive-date = April 29, 2023 |archive-url = https://web.archive.org/web/20230429022902/https://magicvalley.com/america-s-longest-north-south-highways/article_f42f6adc-2084-5036-a39d-7487c860b9e1.html |url-status = live }}</ref> US&nbsp;1 is generally paralleled by [[Interstate 95]] (I-95), though US&nbsp;1 is significantly farther west and inland between [[Jacksonville, Florida]], and [[Petersburg, Virginia]], while I-95 is closer to the coastline. In contrast, US&nbsp;1 in Maine is much closer to the coast than I-95, which runs farther inland than US&nbsp;1. The route connects most of the major cities of the [[East Coast of the United States|East Coast]] from the [[Southeastern United States]] to [[New England]], including [[Miami]], [[Jacksonville, Florida|Jacksonville]], [[Augusta, Georgia|Augusta]], [[Columbia, South Carolina|Columbia]], [[Raleigh, North Carolina|Raleigh]], [[Richmond, Virginia|Richmond]], [[Washington, D.C.]], [[Baltimore]], [[Philadelphia]], [[Newark, New Jersey|Newark]], [[New York City]], [[New Haven, Connecticut|New Haven]], [[Providence, Rhode Island|Providence]], [[Boston]], and [[Portland, Maine|Portland]].

While US&nbsp;1 is generally the easternmost of the main north–south U.S. Routes, parts of several others occupy corridors closer to the ocean. When the road system was laid out in the 1920s, US&nbsp;1 was mostly assigned to the existing [[Atlantic Highway (United States)|Atlantic Highway]], which followed the [[Atlantic Seaboard Fall Line]] between the [[Piedmont (United States)|Piedmont]] and the [[Atlantic Plain]] north of [[Augusta, Georgia]].<ref>{{cite web |url = https://www.fhwa.dot.gov/infrastructure/ewjames.cfm |title = E. W. James on designating the Federal-aid system and developing the U.S. numbered highway plan |publisher = [[Federal Highway Administration]] |access-date = August 9, 2012 |archive-date = September 24, 2008 |archive-url = https://web.archive.org/web/20080924120943/http://www.fhwa.dot.gov/infrastructure/ewjames.htm |url-status = live }}</ref> At the time, the highways farther east were of lower quality and did not serve the major population centers.<ref name = "1926 Rand McNally"/> From [[Henderson, North Carolina]], to [[Petersburg, Virginia]], it is paralleled by [[Interstate 85|I-85]]. Construction of the Interstate Highway System gradually changed the use and character of US&nbsp;1, and I-95 became the major north–south East Coast highway by the late 1960s.

==Route description==
{{lengths table}}
|-
|[[U.S. Route 1 in Florida|FL]]
|{{convert|545|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Georgia|GA]]
|{{convert|223|mi|km|disp=table}}
|-
|[[U.S. Route 1 in South Carolina|SC]]
|{{convert|171|mi|km|disp=table}}
|-
|[[U.S. Route 1 in North Carolina|NC]]
|{{convert|174|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Virginia|VA]]
|{{convert|197|mi|km|disp=table}}
|-
|[[U.S. Route 1 in the District of Columbia|DC]]
|{{convert|7|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Maryland|MD]]
|{{convert|81|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Pennsylvania|PA]]
|{{convert|81|mi|km|disp=table}}
|-
|[[U.S. Route 1 in New Jersey|NJ]]
|{{convert|66|mi|km|disp=table}}
|-
|[[U.S. Route 1 in New York|NY]]
|{{convert|22|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Connecticut|CT]]
|{{convert|117|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Rhode Island|RI]]
|{{convert|57|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Massachusetts|MA]]
|{{convert|86|mi|km|disp=table}}
|-
|[[U.S. Route 1 in New Hampshire|NH]]
|{{convert|17|mi|km|disp=table}}
|-
|[[U.S. Route 1 in Maine|ME]]
|{{convert|526|mi|km|disp=table}}
|-
|Total
|{{convert|2369|mi|km|disp=table}}
|}
[[File:US 1 (FL).svg|thumb|70x70px|A US 1 shield used in Florida prior to 1993]]
{{multiple image
| align             = right
| direction         = vertical
| width             = 220
| image1            = Southernmost point of U.S. Highway 1.jpg
| caption1          = Mile 0, Key West, Florida
| image2            = Moser Channel top.jpg
| caption2          = US&nbsp;1 crossing [[Moser Channel]] along the Overseas Highway, Florida Keys
| image3            = Southern Biscayne Boulevard.jpg
| caption3          = US&nbsp;1 along [[Biscayne Boulevard]] in downtown Miami, Florida
| image4            = Augsky2.JPG
| caption4          = Skyline of Augusta, Georgia, as seen from US&nbsp;1 in North Augusta near I-520
| image5            = Beltline1.JPG
| caption5          = [[Interstate 40|I-40]] east approaching the Raleigh Beltline, which includes US&nbsp;1
| image6            = 14thStreetbridgeWashingtonDC.jpg
| caption6          = US&nbsp;1 going over the left-most of the [[14th Street bridges]], Washington DC
| image7            = 2021-08-16_13_32_31_View_of_the_Conowingo_Dam_from_Maryland_State_Route_222_(Susquehanna_River_Road)_in_Conowingo_Station,_Cecil_County,_Maryland.jpg
| caption7          = US&nbsp;1 crossing the [[Susquehanna River]] on the [[Conowingo Dam]] in Cecil County, Maryland
| image8            = US 1 NB past PA 532.jpeg
| caption8          = US&nbsp;1 along [[Roosevelt Boulevard (Philadelphia)|Roosevelt Boulevard]] in Philadelphia, Pennsylvania
| image9            = Pulaski Skyway full view.jpg
| caption9          = [[Pulaski Skyway]], in Jersey City, Kearny, and Newark, New Jersey
| image10           = Boston skyline from Malone Park, Chelsea, February 2014.jpg
| caption10         = [[Tobin Bridge]] with the Boston skyline, as seen from [[Chelsea, Massachusetts]]
| image11           = Memorial Bridge (Portsmouth, New Hampshire) April 2016.JPG
| caption11         = [[Memorial Bridge (Portsmouth, New Hampshire)|Memorial Bridge]] between New Hampshire and Maine, 2016
| image12           = Start US Highway 1.jpg
| caption12         = Monument in Fort Kent dedicated to US&nbsp;1, Fort Kent, Maine
}}

===Florida===
{{main|U.S. Route 1 in Florida|Overseas Highway}}
US&nbsp;1 travels along the east coast of [[Florida]], beginning at 490 Whitehead Street in [[Key West]]<ref>{{google maps |url = https://maps.google.com/maps?f=q&hl=en&geocode=&q=490+Whitehead+St,+Key+West,+FL+33040&sll=24.564454,-81.803019&sspn=0.009114,0.013819&layer=c&ie=UTF8&ll=24.559927,-81.803319&spn=0.009114,0.013819&z=16&cbll=24.555358,-81.804056&panoid=FI83lxPQwLIYR-9LZ7Y8rQ&cbp=1,20.256207176035787,,0,5 |title = 490 Whitehead St, Key West, FL 33040 |access-date=August 9, 2012}}</ref> and passing through [[Miami]], [[Hollywood, Florida|Hollywood]], [[Fort Lauderdale, Florida|Fort Lauderdale]], [[Boca Raton, Florida|Boca Raton]], [[West Palm Beach, Florida|West Palm Beach]], [[Jupiter, Florida|Jupiter]], [[Fort Pierce, Florida|Fort Pierce]], [[Melbourne, Florida|Melbourne]], [[Cocoa, Florida|Cocoa]], [[Titusville, Florida|Titusville]], [[Daytona Beach, Florida|Daytona Beach]], [[Palm Coast, Florida|Palm Coast]], [[St. Augustine, Florida|St. Augustine]], and [[Jacksonville, Florida|Jacksonville]]. The southernmost piece through the chain islands of the [[Florida Keys]], about {{convert|100|mi|km}} long, is the two-lane [[Overseas Highway]], originally built in the late 1930s after railroad tycoon [[Henry Flagler]]'s [[Florida East Coast Railway]]'s [[Overseas Railroad]], which was built between 1905 and 1912 on stone pillars, was ruined by the [[1935 Labor Day hurricane]]. The rest of US&nbsp;1 in Florida is generally a four-lane [[divided highway]], despite the existence of the newer [[Interstate 95|I-95]] not far away. Famous vacation scenic route [[Florida State Road A1A|State Road&nbsp;A1A]] is a continuous oceanfront alternate to US&nbsp;1 that runs along the beaches of the [[Atlantic Ocean]], cut only by assorted unbridged inlets and the [[Kennedy Space Center]] at [[Cape Canaveral]]. North of Jacksonville, US&nbsp;1 turns northwest toward [[Augusta, Georgia]]; [[U.S. Route 17|US&nbsp;17]] becomes the coastal route into [[Virginia]], where [[U.S. Route 13|US&nbsp;13]] takes over.<ref name=maps>[[Google Maps]] street maps and [[USGS]] [[topographic map]]s, accessed via [http://mapper.acme.com/ ACME Mapper] {{Webarchive|url=https://web.archive.org/web/20221119110322/http://mapper.acme.com/ |date=November 19, 2022 }}{{full citation needed|date=January 2017}}</ref> In Florida until the 1990s, US&nbsp;1 used high-contrast markers (white text on a red background).<ref>{{cite news |first = John |last =  Gordon |work = [[The Virginian-Pilot]] |title = US Highway 17 to Florida: Scenic, Historic and Very Slow, December 29, 1993 |quote = Drivers know they're in Florida when they notice the U.S. Highway signs are color-coded for easy recognition. The US&nbsp;17 signs, for example, are yellow, while those of US&nbsp;1 are red, US&nbsp;90 blue. and US&nbsp;27 green }}{{full citation needed|date= January 2017}}</ref>

===Georgia===
{{main|U.S. Route 1 in Georgia}}
The part of US&nbsp;1 in [[Georgia (U.S. state)|Georgia]], as it shifts from the coastal alignment in Florida to the Atlantic Seaboard Fall Line alignment in South Carolina, is generally very rural, passing through marshes and former [[Plantation complexes in the Southern United States|plantations]] between the towns and cities of [[Folkston, Georgia|Folkston]], [[Waycross, Georgia|Waycross]], [[Alma, Georgia|Alma]], [[Baxley, Georgia|Baxley]], [[Lyons, Georgia|Lyons]], [[Swainsboro, Georgia|Swainsboro]], and [[Augusta, Georgia|Augusta]]. The [[Georgia Department of Transportation]] has an ongoing plan to widen all of US&nbsp;1 to four lanes with bypasses, which is more than 50&nbsp;percent complete.

===The Carolinas===
{{main|U.S. Route 1 in South Carolina|U.S. Route 1 in North Carolina}}
In [[South Carolina]], US&nbsp;1 generally serves mostly rural areas as it falls west of [[Interstate 95|I-95]] while the coastal areas are served by routes east of it. Starting in South Carolina, US&nbsp;1 is paralleled by [[Interstate 20|I-20]] along the [[Atlantic Seaboard Fall Line]] through [[Aiken, South Carolina|Aiken]], [[Lexington, South Carolina|Lexington]], and [[Columbia, South Carolina|Columbia]] to [[Camden, South Carolina|Camden]] and [[Lugoff, South Carolina|Lugoff]]. US&nbsp;1 functions as a local two-lane road with occasional boulevard stretches. After Camden, US&nbsp;1 continues northeast away from any Interstate toward [[Bethune, South Carolina|Bethune]], [[Patrick, South Carolina|Patrick]], [[McBee, South Carolina|McBee]], and [[Cheraw, South Carolina|Cheraw]] with no bypasses or four-lane sections except around Cheraw through the [[U.S. Route 52|US&nbsp;52]] and [[South Carolina Highway 9]] (SC&nbsp;9) concurrencies. After SC&nbsp;9, it continues northward into North Carolina as a two -lane highway. The [[South Carolina Department of Transportation]] (SCDOT) has no plans to widen or bypass any US&nbsp;1 alignments northeast of Camden to the North Carolina line.

Between the South Carolina line and the [[U.S. Route 74|US&nbsp;74]] bypass, US&nbsp;1 is a two-lane road but sees a considerable amount of truck and tourist traffic of people cutting through from the US&nbsp;74/[[U.S. Route 220|US&nbsp;220]] and [[Interstate 73|I-73]]/[[Interstate 74|I-74]] corridor attempting to reach points south and east. US&nbsp;1 goes through downtown [[Rockingham, North Carolina|Rockingham]], with a bypass in the future plans. North of the [[North Carolina Highway 177]] (NC&nbsp;177) junction, it becomes four lanes or greater, becoming a [[superstreet]] with limited access and then becoming a limited access freeway. US&nbsp;1 becomes a major artery for the state as it moves north of Rockingham. After [[Richmond County, North Carolina|Richmond County]], it goes into [[Moore County, North Carolina|Moore County]] with two expressway bypasses in [[Southern Pines, North Carolina|Southern Pines]], [[Vass, North Carolina|Vass]], and [[Cameron, North Carolina|Cameron]]. US&nbsp;1 continues with the [[Jefferson Davis Highway]] label through [[Lee County, North Carolina|Lee County]] and [[Sanford, North Carolina|Sanford]], and on to [[Cary, North Carolina|Cary]] and [[Raleigh, North Carolina|Raleigh]]. US&nbsp;1 runs concurrently with [[U.S. Route 64|US&nbsp;64]] through most of Cary, where the freeway recently underwent a major renovation and improvements that added lanes in both directions.<ref>{{cite web |title=US 1/64 Widening |url = http://www.townofcary.org/Departments/Engineering/Engineering_Projects/US_1_64_Widening.htm |publisher=Town of Cary, North Carolina |archive-url = https://web.archive.org/web/20120314183019/http://www.townofcary.org/Departments/Engineering/Engineering_Projects/US_1_64_Widening.htm |archive-date = March 14, 2012 }}{{full citation needed|date=January 2017}}</ref> North of Raleigh, US&nbsp;1 (known as Capital Boulevard in northern Wake County) crosses [[Interstate 540 (North Carolina)|I-540]] and then again becomes a four-lane divided arterial to [[Interstate 85|I-85]] near [[Henderson, North Carolina|Henderson]]. The [[North Carolina Department of Transportation]] (NCDOT) has begun a corridor study for this section of US&nbsp;1<ref>{{cite web |url = http://www.ncdot.org/projects/US1corridor/ |title = US&nbsp;1 Corridor Study |publisher = North Carolina Department of Transportation |access-date = August 9, 2012 |archive-date = March 24, 2012 |archive-url = https://web.archive.org/web/20120324052923/http://www.ncdot.org/projects/US1corridor/ |url-status = dead }}</ref> to determine the feasibility of transitioning the stretch of highway from I-540 to Wake Forest into a toll road.<ref>{{Cite web |date=2025-05-22 |title=Toll debate at center of Capital Boulevard expansion project after dueling votes |url=https://abc11.com/post/toll-debate-center-capital-boulevard-expansion-project-dueling-votes/16500230/ |access-date=2025-05-24 |website=ABC11 Raleigh-Durham |language=en}}</ref> Moreover, NCDOT is planning to finish four-laning US&nbsp;1 in Richmond County past NC&nbsp;177 with a Rockingham bypass to the east. There are no plans from SCDOT to widen US&nbsp;1 from the state line. From Henderson into Virginia, US&nbsp;1 runs parallel with I-85 as a two-lane local road until the state line, where Virginia hosts a continuous third center lane for alternate passing toward [[U.S. Route 58|US&nbsp;58]] before [[South Hill, Virginia|South Hill]].

===Mid-Atlantic===
{{main|U.S. Route 1 in Virginia|U.S. Route 1 in the District of Columbia|U.S. Route 1 in Maryland|U.S. Route 1 in Pennsylvania|U.S. Route 1 in New Jersey|U.S. Route 1 in New York}}

In the [[Mid-Atlantic (United States)|Mid-Atlantic]], US&nbsp;1 generally serves some of the [[Northeast megalopolis|most populated areas of the east coast]].  Through [[Virginia]], US&nbsp;1 is paralleled by Interstates: the remainder of [[Interstate 85|I-85]] to [[Petersburg, Virginia|Petersburg]], [[Interstate 95|I-95]] through [[Richmond, Virginia|Richmond]] and [[Fredericksburg, Virginia|Fredericksburg]] to [[Alexandria, Virginia|Alexandria]], and [[Interstate 395 (Virginia–District of Columbia)|I-395]] into [[Arlington County, Virginia|Arlington]]. In much of Virginia, US&nbsp;1 was called the [[Jefferson Davis Highway]] by state law, although there are exceptions. South of Petersburg, it is known as Boydton Plank Road. Through some of [[Fairfax County, Virginia|Fairfax County]] and Alexandria, it is called the Richmond Highway.<ref>{{Cite news|url=https://www.washingtonpost.com/local/dc-politics/a-plastic-straw-ban-and-a-confederate-name-change-new-laws-in-the-dc-region-in-2019/2018/12/31/60e4d954-0d1c-11e9-831f-3aa2c2be4cbd_story.html|title=A plastic straw ban and a Confederate name change: New laws in the D.C. region in 2019|last1=Nirappil|first1=Fenit|date=December 31, 2018|newspaper=Washington Post|access-date=January 3, 2019|last2=Hernandez|first2=Arelis R.|archive-date=January 3, 2019|archive-url=https://web.archive.org/web/20190103054831/https://www.washingtonpost.com/local/dc-politics/a-plastic-straw-ban-and-a-confederate-name-change-new-laws-in-the-dc-region-in-2019/2018/12/31/60e4d954-0d1c-11e9-831f-3aa2c2be4cbd_story.html|url-status=live}}</ref> In February 2021, Virginia renamed all remaining portions of the Jefferson Davis Highway in the state to Emancipation Highway beginning on January 1, 2022.<ref name=":0">{{Cite web|title=LIS > Bill Tracking > HB2075 > 2021 session|url=https://lis.virginia.gov/cgi-bin/legp604.exe?211+sum+HB2075|access-date=February 26, 2021|website=lis.virginia.gov|archive-date=February 10, 2021|archive-url=https://web.archive.org/web/20210210043922/https://lis.virginia.gov/cgi-bin/legp604.exe?211+sum+HB2075|url-status=live}}</ref><ref name=":2">{{Cite web|last=Thomas|first=Pat|title=Governor signs remaining bills from 2021 Special Session|date=March 31, 2021|url=https://www.whsv.com/2021/04/01/governor-signs-remaining-bills-from-2021-special-session/|access-date=April 3, 2021|location=Harrisonburg, Virginia|publisher=[[WHSV-TV]]|language=en|archive-date=April 1, 2021|archive-url=https://web.archive.org/web/20210401163057/https://www.whsv.com/2021/04/01/governor-signs-remaining-bills-from-2021-special-session/|url-status=live}}</ref>

US&nbsp;1 crosses the [[Potomac River]] with I-395 on the [[14th Street bridges]] and splits to follow mainly [[14th Street (Washington, D.C.)|14th Street]] and [[Rhode Island Avenue]] through the [[District of Columbia]]. US&nbsp;1 is at the minimum of three lanes (with alternate passing) from the North Carolina state line to Petersburg with occasional four-lane divided sections. North of Petersburg is a four-lane undivided roadway at the minimum to the DC line. The route of US&nbsp;1 from Petersburg to the state line is parallel with the [[Atlantic Seaboard Fall Line]]. From Petersburg onward, it is parallel with I-95. After exiting DC into [[Maryland]], US&nbsp;1 follows the Baltimore–Washington Boulevard, the first of several modern highways built along the [[Washington–Baltimore combined statistical area]] corridor; I-95 is the newest, after the [[Baltimore–Washington Parkway]]. US&nbsp;1 runs through the [[University of Maryland, College Park]], campus in [[College Park, Maryland]]. The route bypasses [[Downtown Baltimore]] on [[North Avenue (Baltimore)|North Avenue]] and exits the city to the northeast on Belair Road, gradually leaving the I-95 corridor, which passes through [[Wilmington, Delaware]], for a straighter path toward [[Philadelphia]]. Around and beyond [[Bel Air, Harford County, Maryland|Bel Air]], US&nbsp;1 is a two-lane road, crossing the [[Susquehanna River]] over the top of the [[Conowingo Dam]] before entering Pennsylvania. (Routed further north, US&nbsp;1 bypasses the state of [[Delaware]], unlike I-95.)<ref name=maps/>

The two-lane US&nbsp;1 becomes a four-lane [[Controlled-access highway|expressway]], officially known as the John H. Ware III Memorial Highway, after [[John H. Ware III|the Pennsylvania representative]], just after crossing into [[Pennsylvania]]. This bypass extends around [[Oxford, Pennsylvania|Oxford]] and [[Kennett Square, Pennsylvania|Kennett Square]], merging into the four-lane divided [[Baltimore Pike]] just beyond the latter. At [[Media, Pennsylvania|Media]], US&nbsp;1 again becomes a freeway—the Media Bypass—ending just beyond [[Interstate 476|I-476]]. After several name changes, the road becomes [[City Avenue]], the western city limits of [[Philadelphia]], at the end of which a short [[Concurrency (road)|overlap]] with [[Interstate 76 (Ohio–New Jersey)|I-76]] leads to the [[Roosevelt Expressway (Philadelphia)|Roosevelt Expressway]] and then the 12-lane [[Roosevelt Boulevard (Philadelphia)|Roosevelt Boulevard]] partly overlapping [[U.S. Route 13|US&nbsp;13]]. US&nbsp;1 again becomes a freeway after leaving the city, bypassing [[Penndel, Pennsylvania|Penndel]] and [[Morrisville, Bucks County, Pennsylvania|Morrisville]] and crossing the [[Delaware River]] into [[New Jersey]] on the [[Trenton–Morrisville Toll Bridge]].<ref name=maps/>

After crossing into [[New Jersey]] in Mercer County, US&nbsp;1 continues on the [[Trenton Freeway]] through the state capital of [[Trenton, New Jersey|Trenton]] and [[Lawrence Township, Mercer County, New Jersey|Lawrence Township]] as a four-lane freeway. As the freeway ends, the four-lane [[divided highway]] upgrades to six lanes north of [[Interstate 295 (Delaware–Pennsylvania)|I-295]] passing through the [[Penns Neck, New Jersey|Penns Neck]] section of [[West Windsor, New Jersey|West Windsor]]. Through Penns Neck is a series of traffic signals. The [[New Jersey Department of Transportation]] (NJDOT) is looking to revamp the highway through this area by replacing traffic signals with grade separations. The highway enters [[Middlesex County, New Jersey|Middlesex County]] through [[Plainsboro Township, New Jersey|Plainsboro Township]] and [[South Brunswick, New Jersey|South Brunswick]], where the highest point resides.<ref>{{Cite journal|last=Rosenthal|first=Harold|date=1983|title=Water tower in South Brunswick Township|url=https://rucore.libraries.rutgers.edu/rutgers-lib/43303/|journal=Rutgers University Community Repository|language=en|doi=10.7282/T3N58JK0|access-date=August 29, 2017|archive-date=August 30, 2017|archive-url=https://web.archive.org/web/20170830004531/https://rucore.libraries.rutgers.edu/rutgers-lib/43303/|url-status=live}}</ref> By Forrestal Village, the highway downgrades from six to four lanes until after Finnegans Lane in [[North Brunswick, New Jersey|North Brunswick]]. Northward, it continues through [[New Brunswick, New Jersey|New Brunswick]] as a short limited-access highway until the [[County Route 529 (New Jersey)|County Route&nbsp;529]] (CR&nbsp;529)/Plainfield Avenue traffic signal in [[Edison, New Jersey|Edison]]. Through Edison and [[Woodbridge Township, New Jersey|Woodbridge Township]], US&nbsp;1 has a mix of boulevard and limited-access segments and continues to do so after the [[U.S. Route 9 in New Jersey|US&nbsp;9]] juncture in the [[Avenel, New Jersey|Avenel]] section of Woodbridge. The [[U.S. Route 1/9|US&nbsp;1/9]] [[concurrency (road)|concurrency]] continues through the rest of the state. The six-lane divided highway remains through [[Rahway, New Jersey|Rahway]] in [[Union County, New Jersey|Union County]] and [[Elizabeth, New Jersey|Elizabeth]], until it reaches [[Newark Liberty International Airport]], where it becomes a dual carriageway freeway around downtown [[Newark, New Jersey|Newark]] in [[Essex County, New Jersey|Essex County]] with a 2–2–2–2 configuration. The historic [[Pulaski Skyway]] takes US&nbsp;1/9 into [[Jersey City, New Jersey|Jersey City]], and the route exits the freeway at the [[Tonnele Circle]] to head north into [[Bergen County, New Jersey|Bergen County]]. US&nbsp;1/9 turns onto [[U.S. Route 46|US&nbsp;46]] as a limited-access highway, and the three routes run northeast to the [[George Washington Bridge Plaza]], where they merge into I-95. US&nbsp;46 ends in the middle of the bridge, which crosses the [[Hudson River]] into [[New York (state)|New York]], and [[U.S. Route 9|US&nbsp;9]] exits just beyond onto [[Broadway (Manhattan)|Broadway]] in [[Manhattan]], but US&nbsp;1 stays with I-95 onto the [[Cross Bronx Expressway]], exiting in [[the Bronx]] onto Webster Avenue. Two turns take US&nbsp;1 via [[Fordham Road]] to Boston Road, which it follows northeast out of the city, becoming Boston Post Road in [[Westchester County, New York|Westchester County]], never straying far from I-95. From the Bronx to the state line, it is a local road with two lanes in each direction, except in [[Rye, New York|Rye]] where it has a single lane in each direction. As it enters [[Greenwich, Connecticut]], it continues as a two-lane local road.

===New England===
{{main|U.S. Route 1 in Connecticut|U.S. Route 1 in Rhode Island|U.S. Route 1 in Massachusetts|U.S. Route 1 in New Hampshire|U.S. Route 1 in Maine}}

In [[New England]], US&nbsp;1 generally serves large cities in a side street capacity. In [[Connecticut]], US&nbsp;1 serves the shore of [[Long Island Sound]] parallel to [[Interstate 95|I-95]]. Beyond [[New Haven, Connecticut|New Haven]], the highway travels east–west, and some signs in the state indicate this rather than the standard north–south. While I-95 in [[Rhode Island]] takes a diagonal path to [[Providence, Rhode Island|Providence]], US&nbsp;1 continues east along the coast through [[Westerly, Rhode Island|Westerly]] to [[Wakefield-Peacedale, Rhode Island|Wakefield-Peacedale]], where it turns north and follows [[Narragansett Bay]]. Most of this part is a four-lane [[limited-access highway]], providing access to [[Rhode Island Route 138|Route&nbsp;138]] toward [[Newport, Rhode Island|Newport]]. After [[Rhode Island Route 4|Route&nbsp;4]] splits as a mostly-[[freeway]] connection to I-95, US&nbsp;1 becomes a lower-speed surface road, passing through [[Warwick, Rhode Island|Warwick]], Providence, and [[Pawtucket, Rhode Island|Pawtucket]]. The route parallels I-95 again through Providence and Pawtucket and into [[Massachusetts]], traveling toward [[Boston]] as a four-lane road. When it reaches [[Dedham, Massachusetts|Dedham]], US&nbsp;1 turns east and becomes a freeway through metropolitan Boston, [[Concurrency (road)|concurrent]] with I-95 and [[Interstate 93|I-93]] east to [[Braintree, Massachusetts|Braintree]] and north through [[Downtown Boston]]. The [[Tobin Bridge]] and [[Northeast Expressway (Boston)|Northeast Expressway]] take US&nbsp;1 out of Boston, after which it again parallels I-95 as a high-speed surface road through [[Newburyport, Massachusetts|Newburyport]] to the New Hampshire state line.<ref name=maps/>

The short portion of US&nbsp;1 in [[New Hampshire]] follows the historic Lafayette Road, staying close to I-95, passing through [[Portsmouth, New Hampshire|Portsmouth]] before crossing the [[Piscataqua River]] on [[Memorial Bridge (Portsmouth, New Hampshire)|Memorial Bridge]], which was demolished and replaced during 2012–2013, leaving a temporary gap in US&nbsp;1. During construction, drivers had to detour to one of two other nearby bridges carrying [[U.S. Route 1 Bypass (Portsmouth, New Hampshire–Kittery, Maine)|US&nbsp;1 Bypass]] or I-95. Within [[Maine]], US&nbsp;1 begins as a parallel route to I-95 near the [[Atlantic Ocean]]. At [[Portland, Maine|Portland]], I-95 splits off to the north, and [[Interstate 295 (Maine)|I-295]] heads northeast paralleling US&nbsp;1 to [[Brunswick, Maine|Brunswick]]. There US&nbsp;1 turns east as a mostly two-lane road along the coast to [[Calais, Maine|Calais]]; much of this portion is advertised as the "Coastal Route" on signs. North from Calais, US&nbsp;1 follows the [[Canada–United States border|Canadian border]], crossing I-95 in Houlton and eventually turning west and southwest to its "north" end at the [[Clair–Fort Kent Bridge]] in [[Fort Kent, Maine|Fort Kent]]. On the [[New Brunswick]] (Canada) side of the bridge, [[New Brunswick Route 205|Route&nbsp;205]] extends south and west to [[Saint-François-de-Madawaska]], while the short [[New Brunswick Route 161|Route&nbsp;161]] extends north to [[New Brunswick Route 120|Route&nbsp;120]], a secondary east–west route from [[Edmundston]], [[New Brunswick]], west to [[Quebec Route 289]] toward [[Saint-Alexandre-de-Kamouraska]], [[Quebec]].<ref name=maps/>

==History==
[[File:Photograph of a road sign along the highway in Key West, Florida, announcing the beginning of U.S. Route 1 to Fort... - NARA - 200542.jpg|thumb|left|The beginning of US&nbsp;1 as of March 1951]]
The direct predecessor to US&nbsp;1 was the '''Atlantic Highway''', an [[auto trail]] established in 1911 as the Quebec–Miami International Highway. In 1915, it was renamed the Atlantic Highway,<ref>{{cite book |first = William |last = Kaczynski |title = The American Highway: The History and Culture of Roads in the United States |year = 2000 |page= 38 }}{{full citation needed|date=January 2017}}</ref> and the northern terminus was changed to [[Calais, Maine]].<ref>{{cite news |work = [[Decatur Daily Review]] |title = Many Auto Highways Gridiron the Nation |date = November 14, 1915 }}{{full citation needed|date=January 2017}}</ref> Due to the overlapping of auto trail designations, portions of the route had other names that remain in common use, such as the [[Boston Post Road]] between [[Boston]] and [[New York City]], the [[Lincoln Highway]] between New York and [[Philadelphia]], the Baltimore Pike between Philadelphia and [[Baltimore]], and the [[Dixie Highway]] in and south of eastern [[Georgia (U.S. state)|Georgia]]. North of [[Augusta, Georgia]], the highway generally followed the [[Atlantic Seaboard Fall Line]], rather than a more easterly route through the [[swamp]]s of the [[Atlantic Plain]].<ref>{{cite map |author = Clason Map Company |author-link = Clason Map Company |url = https://www.fhwa.dot.gov/infrastructure/midgetmap.cfm |title = Midget Map of the Transcontinental Trails of the United States |year= 1923 |publisher= Clason Map Company |via = Federal Highway Administration }}{{full citation needed|date=January 2017}}</ref> [[Brickell Avenue]] is the name given to the {{convert|2|mi|km|adj=on|spell=in}} stretch of US&nbsp;1 in [[Miami, Florida]], just south of the [[Miami River (Florida)|Miami River]] until the [[Rickenbacker Causeway]].

When the [[New England road marking system]] was established in 1922, the Atlantic Highway within [[New England]] was signed as [[New England road marking system#Route 1|Route&nbsp;1]], with a [[New England road marking system#Route 24|Route&nbsp;24]] continuing north to [[Madawaska, Maine|Madawaska]];<ref>{{cite news |work = [[The New York Times]] |title = Motor Sign Uniformity |date = April 16, 1922 |page= 98 }}</ref> [[New York (state)|New York]] extended the number to [[New York City]] in 1924 with its own [[New York State Route 1|Route&nbsp;1]].<ref>{{cite news |work = The New York Times |title = New York's Main Highways Designated by Numbers |date= December 21, 1924 |page = XX9 }}</ref> Other states adopted their own systems of numbering; by 1926 all states but [[Maryland]] had signed the Atlantic Highway as various routes, usually changing numbers at the state line. In 1925, the [[Joint Board on Interstate Highways]] created a preliminary list of interstate routes to be marked by the states,<ref name="FHWA planning">{{cite web |first = Richard F. |last = Weingroff |url = https://www.fhwa.dot.gov/infrastructure/numbers.cfm |title = From Names to Numbers: The Origins of the U.S. Numbered Highway System |publisher = Federal Highway Administration |access-date = October 12, 2007 |archive-date = October 17, 2007 |archive-url = https://web.archive.org/web/20071017125035/http://wwwcf.fhwa.dot.gov/infrastructure/numbers.htm |url-status = live }}{{full citation needed|date=January 2017}}</ref> including US&nbsp;1 along the Atlantic. This highway began at [[Fort Kent, Maine]], and followed the existing Route&nbsp;24 to [[Houlton, Maine|Houlton]], as well as [[New England road marking system#Route 15|Route&nbsp;15]] to [[Bangor, Maine|Bangor]], beyond which it generally followed the Atlantic Highway to Miami.<ref name="1925 list">{{cite book |type = Report |author = Joint Board on Interstate Highways |year = 1925 |chapter = Appendix VI: Descriptions of the Interstate Routes Selected, with Numbers Assigned |chapter-url = https://en.wikisource.org/wiki/Report_of_Joint_Board_on_Interstate_Highways_October_30,_1925#49 |title = Report of Joint Board on Interstate Highways, October 30, 1925, Approved by the Secretary of Agriculture, November 18, 1925 |location = Washington, DC |publisher = [[United States Department of Agriculture]] |page = 49 |id = {{OCLC|733875457|55123355|71026428}} |via = [[Wikisource]] |access-date = November 14, 2017 |archive-date = November 14, 2017 |archive-url = https://web.archive.org/web/20171114145350/https://en.wikisource.org/wiki/Report_of_Joint_Board_on_Interstate_Highways_October_30,_1925#49 |url-status = live }}</ref> In all states but [[Georgia (U.S. state)|Georgia]] that had numbered their [[state highway]]s, Route&nbsp;1 followed only one or two numbers across the state.<ref name="1926routes">The following routes were used, shown on the 1926 Rand McNally:
*Florida: 4
*Georgia: 15, 17, and 24
*South Carolina: 12 and 50
*North Carolina: 50
*Virginia: 31
*Maryland: state highways were not numbered prior to the U.S. Highway system
*Pennsylvania: 12 and 1
*New Jersey: 13 and 1
*New York: 1
*New England: 1 and 24, and a small piece of 160 beyond [[Madawaska, Maine]] (in the 1925 plan, part of 15 was also used)</ref> The only significant deviation from the Atlantic Highway was between [[Augusta, Georgia]], and [[Jacksonville, Florida]], where Route&nbsp;1 was assigned to a more inland route, rather than following the Atlantic Highway via [[Savannah, Georgia|Savannah]].<ref name="1926 Rand McNally">{{cite map |author = Rand McNally |author-link = Rand McNally |title = Auto Road Atlas |year = 1926 |publisher = Rand McNally |url = http://www.broermapsonline.org/members/ |via = Broer Map Library }}</ref>

One of the many changes made to the system before the final numbering was adopted in 1926 involved US&nbsp;1 in Maine. The 1925 plan had assigned US&nbsp;1 to the shorter inland route (Route&nbsp;15) between Houlton and Bangor, while [[U.S. Route 2|US&nbsp;2]] followed the longer coastal route via Calais. In the system as adopted in 1926, US&nbsp;2 instead took the inland route, while US&nbsp;1 followed the coast, absorbing all of the former Route&nbsp;24 and Route&nbsp;1 in New England.<ref name="1926 map">{{cite map |author1 = Bureau of Public Roads |author-link = Bureau of Public Roads |author2 = American Association of State Highway Officials |author2-link = American Association of State Highway Officials |date = November 11, 1926 |title = United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials |url = https://commons.wikimedia.org/wiki/File:United_States_System_of_Highways_Adopted_for_Uniform_Marking_by_the_American_Association_of_State_Highway_Officials.jpg  |scale = 1:7,000,000 |location = Washington, DC |publisher = [[United States Geological Survey]] |oclc = 32889555 |access-date = November 7, 2013 |via = [[Wikimedia Commons]] |name-list-style = amp }}</ref><ref name="1927 log">{{cite journal |title= United States Numbered Highways |journal = American Highways |publisher = [[American Association of State Highway Officials]] |date = April 1927}}</ref> Many local and regional relocations, often onto parallel [[Highway|superhighway]]s, were made in the early days of US&nbsp;1; this included the four-lane divided [[New Jersey Route 25|Route&nbsp;25]] in [[New Jersey]], completed in 1932 with the opening of the [[Pulaski Skyway]],<ref>{{cite book |last = Hart |first = Steven |title = The Last Three Miles: Politics, Murder, and the Construction of America's First Superhighway |publisher = [[The New Press]] |year = 2007 |isbn = 978-1-59558-098-6 |pages = 1–5 }}</ref> and a bypass of Bangor involving the [[Waldo–Hancock Bridge]], opened in 1931.<ref>{{cite web |author = Maine Department of Transportation |url = http://www.maine.gov/mdot/covered-bridges/waldo.php |title= Waldo–Hancock Bridge |access-date = October 12, 2007 |archive-url = https://web.archive.org/web/20110605235116/http://www.maine.gov/mdot/covered-bridges/waldo.php |archive-date = June 5, 2011 |author-link = Maine Department of Transportation }}</ref> The [[Overseas Highway]] from Miami to [[Key West]] was completed in 1938 and soon became a southern extension of US&nbsp;1.<ref>{{cite map |author = State Road Department of Florida |author-link = State Road Department of Florida |url = http://alabamamaps.ua.edu/historicalmaps/us_states/florida/index3.html |title = Official State Road Map of Florida |year = 1941 |location = Tallahassee |publisher = State Road Department of Florida |access-date = October 12, 2007 |archive-date = November 22, 2007 |archive-url = https://web.archive.org/web/20071122062420/http://alabamamaps.ua.edu/historicalmaps/us_states/florida/index3.html |url-status = dead }}{{full citation needed|date=January 2017}}</ref>

With the construction of the [[Interstate Highway System]] in and after the 1950s, much of US&nbsp;1 from Houlton to Miami was bypassed by [[Interstate 95|I-95]]. Between Houlton and [[Brunswick, Maine]], I-95 took a shorter inland route, much of it paralleling US&nbsp;2 on the alignment proposed for US&nbsp;1 in 1925. Between [[Philadelphia]] and [[Baltimore]], I-95 leaves US&nbsp;1 to pass through [[Wilmington, Delaware|Wilmington]]. Most notably, I-95 and US&nbsp;1 follow different corridors between [[Petersburg, Virginia]], and [[Jacksonville, Florida]]; while US&nbsp;1 followed the Atlantic Seaboard Fall Line west of the coastal plain, I-95 takes a more direct route through the plain and its swamps. Although some of this part of US&nbsp;1 was followed by other Interstates—[[Interstate 85|I-85]] between Petersburg and [[Henderson, North Carolina]], and [[Interstate 20|I-20]] between [[Camden, South Carolina]], and [[Augusta, Georgia]]—the rest remains an independent route with four lanes in many places. By the late 1970s, most of I-95 had been completed, replacing US&nbsp;1 as the main corridor of the east coast and relegating most of it to local road status.<ref>{{cite map |author-link = Gulf Oil |author = Gulf |title = Tourgide: United States, Canada and Mexico |location= Chicago |publisher = [[Rand McNally & Company]] |year = 1977 }}{{full citation needed|date=January 2017}}</ref>

==Major intersections==
;Florida
: Whitehead Street and Fleming Street in [[Key West, Florida|Key West]]
: {{Jct|state=FL|HEFT}} in [[Florida City, Florida|Florida City]]
: {{jct|country=USA|I|95}} in [[Miami]]
: {{jct|country=USA|US|41}} in Miami
: {{jct|country=USA|I|395|dab1=Florida}} in Miami
: {{jct|country=USA|US|27|dab1=Florida}} in Miami
: {{jct|country=USA|I|195|dab1=Florida}} in Miami
: {{jct|country=USA|I|595|dab1=Florida}} on the [[Dania Beach, Florida|Dania Beach]]–[[Fort Lauderdale, Florida]] city line
: {{jct|country=USA|US|98}} in [[West Palm Beach, Florida|West Palm Beach]]
: {{jct|country=USA|US|192}} in [[Melbourne, Florida|Melbourne]]
: {{jct|country=USA|US|92}} in [[Daytona Beach, Florida|Daytona Beach]]
: {{jct|country=USA|I|95}} in [[Ormond Beach, Florida|Ormond Beach]]
: {{jct|country=USA|I|95}} near [[Palm Coast, Florida|Palm Coast]]
: {{jct|country=USA|I|295|dab1=Florida}} in [[Jacksonville, Florida|Jacksonville]]
: {{jct|country=USA|I|95}} in Jacksonville
: {{jct|country=USA|I|95}} in Jacksonville. The highways travel concurrently through the city.
: {{jct|country=USA|US|90}} in Jacksonville. The highways travel concurrently through the city.
: {{jct|country=USA|US|17}} in Jacksonville. The highways travel concurrently through the city.
: {{jct|country=USA|US|23}} in Jacksonville
: {{jct|country=USA|I|95}} in Jacksonville
: {{jct|country=USA|US|23}} in Jacksonville. The highways travel concurrently to north of [[Alma, Georgia]].
: {{jct|country=USA|I|295|dab1=Florida}} in Jacksonville
: {{jct|country=USA|US|301}} in [[Callahan, Florida|Callahan]]. The highways travel concurrently to [[Homeland, Georgia]].
;Georgia
: {{jct|country=USA|US|82}} in [[Waycross, Georgia|Waycross]]. US&nbsp;1/US&nbsp;82/SR&nbsp;520 travels concurrently to west of [[Deenwood, Georgia|Deenwood]].
: {{jct|country=USA|US|84}} in Waycross. The highways travel concurrently through the city.
: {{jct|country=USA|US|341}} in [[Baxley, Georgia|Baxley]]
: {{jct|country=USA|US|280}} in [[Lyons, Georgia|Lyons]]
: {{jct|country=USA|I|16}} in [[Oak Park, Georgia|Oak Park]]
: {{jct|country=USA|US|80}} in [[Swainsboro, Georgia|Swainsboro]]
: {{jct|country=USA|US|319}} in [[Wadley, Georgia|Wadley]]
: {{jct|country=USA|US|221}} in [[Louisville, Georgia|Louisville]]. US&nbsp;1/US&nbsp;221 travels concurrently to [[Wrens, Georgia|Wrens]].
: {{jct|country=USA|I|520}} in [[Augusta, Georgia|Augusta]]
: {{jct|country=USA|US|78|US|278}} in Augusta. US&nbsp;1/US&nbsp;78 travels concurrently to [[Aiken, South Carolina]]. US&nbsp;1/US&nbsp;278 travels concurrently to [[Clearwater, South Carolina]]. US&nbsp;1/SR&nbsp;10 travels concurrently to the [[South Carolina]] state line.
: {{jct|country=USA|US|25}} in Augusta. US&nbsp;1/US&nbsp;25 travels concurrently to [[North Augusta, South Carolina]].  US&nbsp;1/SR&nbsp;121 travels concurrently to the South Carolina state line.
;South Carolina

: {{jct|country=USA|I|520}} in [[North Augusta, South Carolina|North Augusta]]
: {{jct|country=USA|I|20}} north-northeast of Aiken
: {{jct|country=USA|US|178}} in [[Batesburg-Leesville, South Carolina|Batesburg-Leesville]]
: {{jct|country=USA|US|378}} in [[Lexington, South Carolina|Lexington]]. The highways travel concurrently through the city.
: {{jct|country=USA|I|20}} east of Lexington
: {{jct|country=USA|I|26}} in [[Oak Grove, South Carolina|Oak Grove]]
: {{jct|country=USA|US|378}} in [[West Columbia, South Carolina|West Columbia]]. The highways travel concurrently to [[Columbia, South Carolina|Columbia]].
: {{jct|country=USA|US|21|US|176|US|321}} in [[Columbia, South Carolina|Columbia]]
: {{jct|country=USA|US|76}} in Columbia. The highways travel concurrently through the city.
: {{jct|country=USA|I|20}} in [[Dentsville, South Carolina|Dentsville]]
: {{jct|country=USA|I|77}} in Dentsville
: {{jct|country=USA|US|601}} in [[Lugoff, South Carolina|Lugoff]]. The highways travel concurrently to [[Camden, South Carolina|Camden]].
: {{jct|country=USA|US|521|US|601}} in [[Camden, South Carolina|Camden]]
: {{jct|country=USA|US|52}} south-southwest of [[Cheraw, South Carolina|Cheraw]]. The highways travel concurrently to Cheraw.
;North Carolina
: {{jct|country=USA|Future|74|US|74}} west-southwest of [[East Rockingham, North Carolina|East Rockingham]]
: {{jct|country=USA|US|220}} in [[Rockingham, North Carolina|Rockingham]]
: {{jct|country=USA|US|15|US|501}} in [[Aberdeen, North Carolina|Aberdeen]]. The highways travel concurrently through the city.
: {{jct|country=USA|US|15|US|501}} north-northeast of [[Cameron, North Carolina|Cameron]]. The highways travel concurrently to [[Sanford, North Carolina|Sanford]].
: {{jct|country=USA|US|421}} in [[Sanford, North Carolina|Sanford]]
: {{jct|country=USA|US|64}} in [[Cary, North Carolina|Cary]]. The highways travel concurrently to [[Raleigh, North Carolina|Raleigh]].
: {{jct|country=USA|I|40|I|440|dab2=North Carolina|US|64}} in [[Raleigh, North Carolina|Raleigh]]. I-440/US&nbsp;1 travels concurrently through the city.
: {{jct|country=USA|US|70}} in Raleigh
: {{jct|country=USA|I|440|dab1=North Carolina|US|401}} in Raleigh. US&nbsp;1/US&nbsp;401 travels concurrently through the city.
: {{jct|country=USA|I|540|dab1=North Carolina}} near Raleigh
: {{jct|country=USA|US|158}} northeast of [[Henderson, North Carolina|Henderson]]. The highways travel concurrently to [[Norlina, North Carolina|Norlina]].
: {{jct|country=USA|I|85}} southwest of [[Middleburg, North Carolina|Middleburg]]
: {{jct|country=USA|US|158|US|401}} in Middleburg. US&nbsp;1/US&nbsp;401 travels concurrently to north-northwest of [[Wise, North Carolina|Wise]].
: {{jct|country=USA|I|85|US|401}} north-northwest of [[Wise, North Carolina|Wise]]
;Virginia
: {{jct|country=USA|US|58}} southwest of [[South Hill, Virginia|South Hill]]. The highways travel concurrently to just southwest of the city.
: {{jct|country=USA|I|85}} in South Hill
: {{jct|country=USA|I|85}} south of [[Alberta, Virginia|Alberta]]
: {{jct|country=USA|I|85|US|460}} southwest of [[Petersburg, Virginia|Petersburg]]. US&nbsp;1/US&nbsp;460 Bus. travels concurrently to Petersburg.
: {{jct|country=USA|US|301}} in Petersburg. The highways travel concurrently to [[Richmond, Virginia|Richmond]].
: {{jct|country=USA|US|360}} in [[Richmond, Virginia|Richmond]]
: {{jct|country=USA|US|60}} in Richmond
: {{jct|country=USA|US|33|US|250}} in Richmond
: {{jct|country=USA|I|64|I|95}} in Richmond
: {{jct|country=USA|I|95}} in [[Lakeside, Virginia|Lakeside]]
: {{jct|country=USA|I|295|dab1=Virginia}} in [[Glen Allen, Virginia|Glen Allen]]
: {{jct|country=USA|US|17}} east-northeast of [[Spotsylvania, Virginia|Spotsylvania]]. The highways travel concurrently to south of [[Fredericksburg, Virginia|Fredericksburg]].
: {{jct|country=USA|I|95|US|17}} south of [[Fredericksburg, Virginia|Fredericksburg]]
: {{jct|country=USA|I|95}} in [[Lorton, Virginia|Lorton]]
: {{jct|country=USA|I|95|I|495|dab2=Capital Beltway}} in [[Alexandria, Virginia|Alexandria]]
: {{jct|country=USA|I|395|dab1=District of Columbia–Virginia}} in [[Arlington County, Virginia|Arlington]]. The highways travel concurrently to [[Washington, D.C.]]
;District of Columbia
: {{jct|country=USA|US|50}} in [[Washington, D.C.|Washington]]. The highways travel concurrently through part of the city.
: {{jct|country=USA|US|29}} in [[Washington, D.C.|Washington]]. The two highways bump into each other at the intersection of 6th Street NW and [[Rhode Island Avenue NW]].
;Maryland
: {{jct|country=USA|I|95|I|495|dab2=Capital Beltway}} in [[College Park, Maryland|College Park]]
: {{jct|country=USA|I|895|dab1=Maryland}} in [[Elkridge, Maryland|Elkridge]]
: {{jct|country=USA|I|195|dab1=Maryland}} in [[Arbutus, Maryland|Arbutus]]
: {{jct|country=USA|US|40}} in [[Baltimore]]
: {{jct|country=USA|I|83}} in Baltimore
: {{jct|country=USA|I|695|dab1=Maryland}} in [[Overlea, Maryland|Overlea]]
: {{jct|country=USA|US|222}} in [[Conowingo, Maryland|Conowingo]]
;Pennsylvania
: {{jct|country=USA|US|202|US|322}} in [[Concordville, Pennsylvania|Concordville]]. US&nbsp;1/US&nbsp;322 travels concurrently through the community.
: {{jct|country=USA|I|476}} in [[Marple Township, Pennsylvania|Marple Township]]
: {{jct|country=USA|US|30}} on the [[Wynnewood, Pennsylvania|Wynnewood]]–[[Philadelphia]] city line
: {{jct|country=USA|I|76|dab1=Ohio–New Jersey}} on the [[Bala Cynwyd, Pennsylvania|Bala Cynwyd]]–Philadelphia city line. The highways travel concurrently into Philadelphia proper.
: {{jct|country=USA|US|13}} in Philadelphia. The highways travel concurrently through part of the city.
: {{jct|country=USA|I|276}} in [[Bensalem Township, Pennsylvania|Bensalem Township]]
: {{jct|country=USA|I|295|dab1=Delaware–Pennsylvania}} in [[Woodbourne, Pennsylvania|Woodbourne]]
: {{jct|country=USA|US|13}} southwest of [[Morrisville, Bucks County, Pennsylvania|Morrisville]]
;New Jersey
: {{jct|country=USA|I|295|dab1=Delaware–Pennsylvania}} in [[Lawrence Township, Mercer County, New Jersey|Lawrence Township]]
: {{jct|country=USA|US|130}} in [[North Brunswick, New Jersey|North Brunswick]]
: {{jct|country=USA|I|287}} on the [[Edison, New Jersey|Edison]]–[[Metuchen, New Jersey|Metuchen]] city line
: {{jct|country=USA|US|9}} in Woodbridge Township. The highways travel concurrently to [[New York City]].
: {{jct|country=USA|I|278}} in [[Linden, New Jersey|Linden]]
: {{jct|country=USA|I|78|I|95}} in [[Newark, New Jersey|Newark]]
: {{jct|country=USA|US|22}} in Newark
: {{jct|country=USA|I|78|I|95}} in Newark
: {{jct|country=USA|I|95}} in Newark
: {{jct|country=USA|US|46}} in [[Palisades Park, New Jersey|Palisades Park]]. The highways travel concurrently to the [[New Jersey]]-[[New York (state)|New York]] state line at the [[George Washington Bridge]].
: {{jct|country=USA|US|9W}} in [[Fort Lee, New Jersey|Fort Lee]]
: {{jct|country=USA|I|95}} in Fort Lee. The highways travel concurrently to [[The Bronx]], [[New York City]].
: {{jct|country=USA|US|46}} at the New Jersey–New York state line
;New York
: {{jct|country=USA|US|9}} in [[Manhattan]], [[New York City]]
: {{jct|state=NY|I|87}} in [[The Bronx]], New York City
: {{jct|country=USA|I|95}} in The Bronx, New York City
: {{jct|country=USA|I|95}} in [[New Rochelle, New York|New Rochelle]]
: {{jct|country=USA|I|95}} in [[Rye, New York|Rye]]
: {{jct|country=USA|I|287}} on the Rye–[[Port Chester, New York|Port Chester]] city line
;Connecticut
: {{jct|country=USA|I|95}} in [[Stamford, Connecticut|Stamford]]
: {{jct|country=USA|I|95}} in [[Darien, Connecticut|Darien]]
: {{jct|country=USA|US|7}} in [[Norwalk, Connecticut|Norwalk]]
: {{jct|country=USA|I|95}} in [[Fairfield, Connecticut|Fairfield]]
: {{jct|country=USA|I|95}} in [[Stratford, Connecticut|Stratford]]
: {{jct|country=USA|I|95}} in [[Milford, Connecticut|Milford]]
: {{jct|country=USA|I|91}} in [[New Haven, Connecticut|New Haven]]
: {{jct|country=USA|I|95}} in [[East Haven, Connecticut|East Haven]]
: {{jct|country=USA|I|95}} in [[Branford, Connecticut|Branford]]
: {{jct|country=USA|I|95}} in [[Guilford, Connecticut|Guilford]]
: {{jct|country=USA|I|95}} in [[Old Saybrook, Connecticut|Old Saybrook]]. The highways travel concurrently to [[Old Lyme, Connecticut|Old Lyme]].
: {{jct|country=USA|I|95}} in [[East Lyme, Connecticut|East Lyme]]
: {{jct|country=USA|I|95}} in [[New London, Connecticut|New London]]. The highways travel concurrently to [[Groton, Connecticut|Groton]].
;Rhode Island
: {{jct|country=USA|US|6}} in [[Providence, Rhode Island|Providence]]
: {{jct|country=USA|US|44}} in [[Providence, Rhode Island|Providence]]. The highways travel concurrently for one block.
: {{jct|country=USA|I|95}} in [[Pawtucket, Rhode Island|Pawtucket]]. The highways travel concurrently for less than {{convert|1|mi|km}}.
;Massachusetts
: {{jct|country=USA|I|95}} in [[Attleboro, Massachusetts|Attleboro]]
: {{jct|country=USA|I|295|dab1=Rhode Island–Massachusetts}} in [[North Attleborough, Massachusetts|North Attleborough]]
: {{jct|country=USA|I|495|dab1=Massachusetts}} in [[Plainville, Massachusetts|Plainville]]
: {{jct|country=USA|I|95}} in [[Sharon, Massachusetts|Sharon]]
: {{jct|country=USA|I|95}} on the [[Westwood, Massachusetts|Westwood]]–[[Dedham, Massachusetts|Dedham]] city line. The highways travel concurrently to [[Canton, Massachusetts|Canton]].
: {{jct|country=USA|I|93|I|95}} in [[Canton, Massachusetts|Canton]]. I-93/US&nbsp;1 travel concurrently to [[Boston]].
: {{jct|country=USA|US|3}} in Boston
: {{jct|country=USA|I|90}} in Boston
: {{jct|country=USA|I|95}} in [[Peabody, Massachusetts|Peabody]]
: {{jct|country=USA|I|95}} in Peabody
: {{jct|country=USA|I|95}} in [[Danvers, Massachusetts|Danvers]]
;New Hampshire
: {{jct|country=USA|US|4}} in [[Portsmouth, New Hampshire|Portsmouth]]
;Maine
: {{jct|country=USA|I|95}} in [[Kittery, Maine|Kittery]]
: {{jct|country=USA|I|195|dab1=Maine}} in [[Saco, Maine|Saco]]
: {{jct|country=USA|I|295|dab1=Maine}} in [[South Portland, Maine|South Portland]]. The highways travel concurrently to [[Portland, Maine|Portland]].
: {{jct|country=USA|US|302}} in Portland
: {{jct|country=USA|I|495|dab1=Maine}} in [[Falmouth, Maine|Falmouth]]
: {{jct|country=USA|I|295|dab1=Maine}} in [[Yarmouth, Maine|Yarmouth]]
: {{jct|country=USA|I|295|dab1=Maine}} in Yarmouth
: {{jct|country=USA|I|295|dab1=Maine}} in [[Freeport, Maine|Freeport]]
: {{jct|country=USA|I|295|dab1=Maine}} in [[Brunswick, Maine|Brunswick]]
: {{jct|country=USA|US|201}} in Brunswick
: {{jct|country=USA|US|2}} in [[Houlton, Maine|Houlton]]. The highways travel concurrently through the city.
: {{jct|country=USA|I|95}} in Houlton
: {{jct|province=NB|NB|161|NB|205}} at the [[Fort Kent–Clair Border Crossing]] in [[Fort Kent, Maine|Fort Kent]]
<ref name=randmcnally>{{cite book |author = Rand McNally |year = 2014 |title = The Road Atlas |edition = Walmart |location = Chicago |publisher = Rand McNally |pages = 23, 26-29, 45, 47, 49, 65-66, 69, 74-75, 89, 91-92, 107, 111|isbn = 978-0-528-00771-2}}</ref>

==Auxiliary routes==

US&nbsp;1 has six three-digit auxiliary routes. In numerical order, these are:

*[[U.S. Route 201|US&nbsp;201]], from [[Brunswick, Maine]], to the [[Armstrong–Jackman Border Crossing]] running south to north in east-central [[Maine]].
*[[U.S. Route 301|US&nbsp;301]], from [[Sarasota, Florida]], to [[Biddles Corner, Delaware]], along the [[East Coast of the United States|East Coast]]. Most of the route closely parallels [[Interstate 95|I-95]] and it has numerous intersections with its parent.
*[[U.S. Route 401|US&nbsp;401]] from [[Sumter, South Carolina]], to [[Wise, North Carolina]], near the Virginia border. For most of the route, it parallels US&nbsp;1 about {{Convert|10|to|20|mi|km}} to the east, though the two share pavement in [[Raleigh, North Carolina]].
*[[U.S. Route 501|US&nbsp;501]] from [[Myrtle Beach, South Carolina]], to [[Buena Vista, Virginia]]. The highway runs southeast–northwest, meeting its parent in [[Aberdeen, North Carolina|Aberdeen]] and [[Sanford, North Carolina|Sanford]].
*[[U.S. Route 601|US&nbsp;601]] from [[Tarboro, South Carolina]], to [[Mount Airy, North Carolina]]. It runs mostly due south–north to the west of US&nbsp;501, meeting the parent route in [[Camden, South Carolina]].
*[[U.S. Route 701|US&nbsp;701]] from [[Georgetown, South Carolina]], to [[Four Oaks, North Carolina]]. Furthest east of the US&nbsp;1 auxiliary routes, it never meets its parent route, but does intersect US&nbsp;501 in [[Conway, South Carolina]], and terminates at US&nbsp;301 at its northern end.

[[U.S. Route 101|US&nbsp;101]], despite its number, is not an auxiliary route, but rather considered a primary U.S. Route in its own right as major highway west of the former [[U.S. Route 99|US&nbsp;99]] on the west coast of the U.S. (In the numbering scheme, its first "digit" is "10".)

==Related state highways==
*[[Florida State Road A1A]]
*[[Massachusetts Route 1A]]
*[[New Hampshire Route 1A]]
*[[New York State Route 1A]]
*[[Rhode Island Route 1A]]

==In popular culture==
* The route in [[Richard Bachman]]'s horror novel, ''[[The Long Walk (novel)|The Long Walk]]'' (1979), begins each year at the Maine–New Brunswick border at 9:00 on the morning of May 1 and travels down the [[East Coast of the United States]], along US&nbsp;1, until the winner is determined.
*The Atlantic Highway features prominently as both a location, and a character in [[Seanan McGuire]]'s Ghost Roads series.

==See also==
*[[U.S. Route 1A]]
*[[Special routes of U.S. Route 1]]

==References==
{{Reflist|30em}}

==External links==
{{Commons category|U.S. Route 1}}
{{wikivoyage|U.S. Highway 1}}
{{Attached KML|display=title,inline}}
* {{cite web |last = Weingroff |first = Richard F. |publisher = [[Federal Highway Administration]] |url = https://highways.dot.gov/highway-history/general-highway-history/us-1-fort-kent-maine-key-west-florida |title = U.S. 1: Fort Kent, Maine to Key West, Florida |access-date = August 29, 2014 }}
* [http://usends.com/1.html Endpoints of U.S. Highway 1]

{{US 1}}
{{U.S. Routes}}
{{Authority control}}

[[Category:U.S. Route 1| ]]
[[Category:Historic trails and roads in Dedham, Massachusetts]]
[[Category:Interstate 95]]
[[Category:United States Numbered Highway System|01]]