On May 20, the 2025 World Road Tunnel Technology International Academic Conference and the 33rd Annual Academic Conference of the Tunnel Engineering Branch of the China Highway Society opened in Chongqing.

Hosted by the World Road Association and China Merchants Chongqing Transportation Research and Design Institute Co., Ltd.

https://www.mot.gov.cn/jiaotongyaowen/202505/t20250522_4169167.html