China National Highway 110 traffic jam

The China National Highway 110 traffic jam was a recurring traffic jam that began to form on 14 August 2010 on China National Highway 110 (G110) and the Beijing–Tibet expressway (G6) in Hebei and Inner Mongolia, mostly between Jining District, Ulanqab and Dongsheng District, Ordos. The traffic jam slowed thousands of vehicles for more than 100 kilometers (60 mi) and lasted for 12 days.

Source: Wikipedia — China National Highway 110 traffic jam (CC BY-SA 4.0)