Why is Chengdu-Mianyang Expressway closed?

According to the information in Tencent News, due to the foggy weather, the Chengdu-Mianyang double-track expressway, the entrance of the toll station of the whole line is closed, and all vehicles from Chengdu to Mianyang are diverted to Cheng Peng Expressway; All vehicles from Mianyang to Chengdu are diverted to the next stop, Mianyang High-tech Zone.

Chengdu-Mianyang Expressway starts from Hak-Rim Paek Hub in the west, connects to the north exit expressway, passes through Chengdu (Xindu District, qingbaijiang district), Deyang City (Guanghan City, Jingyang District, Luojiang District) and Mianyang City (Fucheng District), ends at Mojia and ends at Mianguang Expressway in the east, with a total length of 92.27 kilometers.