MBTA Requests Design-Build Proposals for GLX

The Massachusetts Bay Transportation Authority’s (MBTA) Green Line Extension (GLX) Project Team has released, to the short-listed DB teams, a draft Request for Proposal (RFP) for the Design Build (DB) contract of the Green Line Extension (GLX). The draft RFP includes an affordability limit of $1.319 billion, base scope of work, and “Additive Options,” should a firm believe the options can be completed within the Project schedule and the budget.

“This draft RFP is a major step in the ongoing procurement process as we proceed towards building the Green Line Extension,” said Program Manager John Dalton. “This document reaffirms the primary objective of delivering the base scope of the program while also allowing for the inclusion of additive-scope options if the completive pricing received from the design-build teams will allow. The maximum price tag for the Green Line Extension Project has been set and supported by the Fiscal and Management Control Board and we will not go beyond this threshold.”

“Teams hoping to participate in the GLX delivery effort must focus first on the core elements—seven stations and train service—before pricing out additional scope elements that would be welcome but not required to comply with the Project’s successful completion,” added Dalton.

The following six additive options are included that the competing design-build firms may propose under the affordability limit: platform canopies; additional elevators; public art; additional connections to the community path in Somerville; extension of the community path between East Somerville and Lechmere Stations; and an enhanced vehicle maintenance facility in Somerville. 


Price proposals for the competing design-build firms are due in September 2017 and must not exceed the established affordability limit of $1.319 billion. The final RFP will be issued in May 2017 after feedback is received from the design-build firms on the draft RFP.