The Yanwu Expressway (Chinese: 延吴高速公路; pinyin: Yán wú gāosù gōnglù), also known as the Yan'an-Wuqi Expressway (Chinese: 延安吴起高速公路; pinyin: Yán'ān Wúqǐ gāosù gōnglù), or the Yan'an-Zhidan-Wuqi Expressway (Chinese: 延安至志丹至吴起高速公路; pinyin: Yán'ān zhì Zhìdān zhì Wúqǐ gāosù gōnglù), or Shaanxi Provincial Expressway S16 (Chinese: 陕高速S16; pinyin: Shǎn gāosù S shí liù) is an expressway in Yan'an, Shaanxi, China.

[1] The route traverses the hills of the Loess Plateau in the Shaanbei region, beginning at an interchange with the G65 Baotou-Maoming Expressway in the town of Yanhewan in Ansai District, and travelling through Zhidan County to its terminus in Wuqi County.

[1] The highway has four lanes, a speed limit of 80 kilometres per hour (50 mph), and a roadbed width of 24.5 metres (80 ft).

[1] Initially, the route was planned to open by the end of 2011,[2] and cost 10.495 billion RMB.

[2] Later, its completion date was pushed back to 2012,[3] and its projected total cost was raised to 10.785 billion RMB.