One of the last expressways to be built outward from the colossal city of Xian, the 94 kilometer Xianyang-Chunhua-Xunyi Expressway is a typical Shaanxi Province artery that crosses large plateaus punctuated by several deep canyons. Xiaohuagou Bridge is one of 4 beam bridge giants on the northern end that have skyscraper-sized piers including the 183 meter monsters of the Sanshuihe Bridge - the world's largest beam bridge viaduct.