Green Line D Branch
The Green Line D branch is a key component of the Massachusetts Bay Transportation Authority (MBTA)'s Green Line, a light rail system serving the Boston, Massachusetts metropolitan area. Known as the Highland branch or Riverside Line, the D branch runs through several municipalities, including Boston, Brookline, Cambridge, Newton, and Somerville.
The Green Line D branch stretches approximately 9 miles (14 km) from Riverside Station to Fenway Station. It operates on a grade-separated surface right-of-way, which contributes to its efficiency and reliability compared to other branches operating in mixed traffic.
Some notable stations along the D branch include:
The D branch was originally a commuter rail line before being converted to a light rail service in 1959. This transformation was part of a broader expansion and modernization effort by the MBTA to improve public transportation within the Greater Boston area.
The D branch is one of several branches that make up the MBTA's Green Line, each identified by a letter:
The Green Line Extension (GLX) project has further expanded the Green Line's reach, enhancing connectivity within the region. The extension project has integrated additional branches into the network, boosting overall accessibility.
The MBTA continues to invest in infrastructure improvements, including the installation of the Green Line Train Protection System (GLTPS). These upgrades aim to modernize the system, ensuring safety and efficiency for all passengers.