昌平区
Line BRT 3 opened on July 20, 2008 and connects Andingmen to Hongfuyuanxiaoqu West (in Changping District) in the north. The line is 22.95 km long with 22 stations but only the northern half is on dedicated lanes. In early 2015, the line was upgraded to use trolleybuses, becoming Asia's first eBRT.