Northern Airport Expressway
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The Capital Airport Northern Expressway, officially numbered S28, is an 11.29 km toll road extension that runs from G45 Daqing–Guangzhou Expressway (formerly Beijing-Chengde Expressway) to the Beijing Capital International Airport in Beijing, China. It was opened in September 2006.<ref>(Chinese) 京承高速二期 机场北线高速全线通车/图 京华时报 Sept. 29, 2006</ref> The opening of this road has helped to alleviate traffic on the Capital Airport Expressway, which had been the sole highway link to the airport. The Capital Airport Northern Expressway allows drivers from Zhongguancun and points north and west of the city to head north first on Jingcheng Expressway before going directly east to the airport, instead of having to go east on the 4th Ring Road to get on the Capital Airport Expressway, where traffic is often clogged near the Siyuan Bridge.