延长线衔接东波士顿隧道上的马维里克站,一直向东北的里维尔海滩和林恩方向延伸至东方高地站。曾经的东部铁路(英语:Eastern Railroad (Massachusetts))和大交汇口铁路(英语:GrandJunctionRailroad)轨道部分被改造成东波士顿绿道(英语:East Boston Greenway),部分为地铁所用。
Line at a three-way flying junction. The yard is on surface level, and the four-track approach includes a bridge over the Grand Central Parkway, despite