Tongguang Expressway is a provincial branch of Sichuan Expressway, which is mainly composed of 18 Chengdu radial line, 9 vertical, 9 horizontal, 4 loop lines and 34 tie lines, and is referred to as "18,9,9" network for short. The planned expressway route in the whole province is about 1.6 1.000 km (excluding the mileage of double-track capacity expansion), including 8,000 km of national highway and 8 1.000 km of provincial highway, and the planned research route is about 1.900 km.
Division of north-south longitudinal line of Tongguang Expressway;
1, Ankang goes to Chongqing via Dazhou: Shaanxi (Ziyang)-Wanyuan-Dazhou-Dazhu-Linshui-Chongqing (Yubei);
2. Zhenba goes to Chongqing via Guang 'an: Shaanxi (Zhenba)-Tongjiang-Pingchang-Quxian-Huaying-Chongqing (Hechuan);
3. Bazhong to Chongqing: Bazhong-Yingshan-Guang 'an-Chongqing (Hechuan);
4. Longnan to Chongqing via Nanchong: Gansu (Wenxian)-Guangyuan-Cangxi-Langzhong-South-Xichong-Nanchong-Vu Thang-Chongqing (Hechuan);
5. Nanchong via Luzhou to Bijie: Nanchong-Chongqing (Tongnan)-Luzhou-Xuyong-Guizhou (Bijie);
6. Xichong via Yibin to Zhaotong: Xichong-Pengxi-Suining-Anyue-Neijiang-Zigong-Yibin-Yunnan (Shuifu);
7. Santai via Zigong to Mabian: Santai-Daying-Lezhi-Zizhong-Zigong-Qianwei-Muchuan-Mabian;
8. Marcand to Panzhihua via Kowloon: Marcand-Jinchuan-Danba-Jiulong-Muli-Yanyuan-Panzhihua;
9. Qinghai via Xinlong to Daocheng: Qinghai (Banma)-Seda-Ganzi-Xinlong-Litang-Daocheng.