Where is the 2 18km of Yan Xi Expressway?

Lv Xiaozhai. Yan Xi Expressway is located at 2 18km in Lv Xiaozhai, and there are different vehicle speed limit signs at 50m on the expressway. Xiyan Expressway starts from Lvxiaozhai Interchange of Xi Ring Expressway in the south, passes through three cities and six counties of Xi, Xianyang, Tongchuan, Yan 'an, Sanyuan, Yijun, Huangling, Luochuan, Fuxian and Ganquan, and ends at Hezhuangping in the northwest of Yan 'an.