The G8516 Bazhong–Chengdu Expressway (), also referred to as the S2 Barong Expressway (), is an expressway in Sichuan, China that connects Bazhong to Chengdu. It was officially opened to traffic on 20 January 2013, and upgraded to a national expressway in July 2022.
Route Chengdu to Nanchong The section from Chengdu to Nanchong has a total length of and is commonly known as the Chengdenan Expressway. It passes through Qingbaijiang, Jintang, Zhongjiang, Santai, Shehong, Yanting and Xichong. The section from Qingbaijiang to Santai and a section in Xichong were opened to traffic on 30 December 2012, while the remaining sections were opened to traffic on 20 January 2013.
Nanchong to Bazhong The Nanchong to Bazhong section is commonly known as the Banan Expressway. It is long and was opened to traffic on 1 January 2013.
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