China National Highway 110 (G110) runs from Beijing to Qingtongxia, via Hohhot, Baotou in Inner Mongolia, and Yinchuan. It heads northwest from Beijing to Zhangjiakou then heads straight west, and runs to approximately 1,100 kilometers (680 mi). In October 2004 and November 2004, it was overwhelmed with traffic diverted from the Jingzhang Expressway, occurring as a result of a massive traffic jam on the expressway. In a related incident in August 2010, a 100-km traffic jam occurred on this route.