Where was the longest traffic jam in recorded history?

The China National Highway 110 traffic jam was a recurring traffic jam that began to form on 14 August 2010, mostly on China National Highway 110 (G110) and the Beijing–Tibet expressway (G6), in Hebei and Inner Mongolia. The traffic jam slowed thousands of vehicles for more than 100 kilometers (60 mi) and lasted for 12 days. Many drivers were able to move their vehicles only 1 km (0.6 mi) per day, and some drivers reported being stuck in the traffic jam for five days. It is considered to be the longest traffic jam in recorded history.