At 17:23 on February 11, 2022, the Gannan Highway Development Center reported that a traffic accident occurred at the G1816 Uma Expressway Linxia to K823+350 (Nanmula Tunnel, Xiahe County, Gannan Tibetan Autonomous Prefecture), causing traffic disruption. Vehicles need to take a detour along the G568 line, and the estimated recovery time is to be determined. On-site contact: Guo Wei, 13893925685.
![The principle of "interval speed measurement" on high speed is very simple, but many car owners are not clear[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)