| Country: | CHN |
| Type: | Expwy |
| Route: | 8516 |
| Alternate Name: | Barong Expressway 巴蓉高速公路 |
| Spur Type: | Expwy |
| Spur Of: | 85 |
| Length Km: | 304.4 |
| Map: | 成巴高速公路.svg |
| Direction A: | West |
| Terminus A: | in Qingbaijiang District, Chengdu, Sichuan |
| Direction B: | East |
| Terminus B: | in Bazhou District, Bazhong, Sichuan |
| Previous Type: | Expwy |
| Previous Route: | 8515 |
| Next Type: | Expwy |
| Next Route: | 8517 |
The G8516 Bazhong–Chengdu Expressway, also referred to as the S2 Barong Expressway, is an expressway in Sichuan, China that connects Bazhong to Chengdu.[1] It was officially opened to traffic on 20 January 2013, and upgraded to a national expressway in July 2022.
The section from Chengdu to Nanchong has a total length of 191km (119miles) and is commonly known as the Chengdenan Expressway. It passes through Qingbaijiang, Jintang, Zhongjiang, Santai, Shehong, Yanting and Xichong.[2] 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.[3]
The Nanchong to Bazhong section is commonly known as the Banan Expressway. It is 113.36km (70.44miles) long and was opened to traffic on 1 January 2013.[4]