北京三环路是北京市城区的一条环城快速路，全长48公里，始建于上世纪80年代初期。北三环路于1994年全线按快速路标准建成通车，有着双向4/6/8车道。
21世纪以来，北京的三环路、四环路周边也形成了新的办公业集聚现象。
Since the 21st century, Third Ring Road and Fourth Ring Road in Beijing has developed a new around office industry center.
长春桥路—远大路连接着西三环路和西四环路， 是北京海淀区一条重要的交通干道和景观大道。
Changchun Bridge Road & Yuanda Road, connected with West Ring 3 and West Ring 4, is an important traffic artery and sight-seeing avenue of Beijing Haidian District.
归纳了快速公交专用道规划实施要点。最后，对北京市南中轴路快速公交专用道以及三环路公交专用道的设置形式进行了分析。
At last, Beijing South-Middle corridor bus rapid transit lane and the research of setting bus lanes on ring roads were studied as a case analysis.
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