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Green Line Train Protection System

The Green Line Train Protection System (GLTPS) combines vehicle and wayside equipment to avoid train-on-train collisions, add red-light signal protection, and incorporate speed enforcement.

Contract awarded: Notice to Proceed given January 2020
Projected completion: Late 2023
Budget: $212,000,000
Status: Design Development

Building a Better T

As part of our $8 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.

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What We're Working On

a timeline: phase 1, July 2022, Equipment Design & Validation Substantially Complete; Phase 2, June 2023, Vehicle Installation Complete; Phase 3, June 2023, Wayside Installation Complete; Phase 4, December 2023, Operational Integration Complete

This project has four overlapping phases:

  • Equipment design: planning how to integrate new components into the existing system
  • Vehicle installation: installing new equipment in Green Line vehicles
  • Wayside installation: installing upgraded signal equipment on the right-of-way
  • Operational integration: preparing the MBTA to use the new safety system

GLTPS: Benefits and How it Works

The GLTPS system uses safety monitoring equipment like radar, signals, and cameras to transmit data to the train as it moves along the tracks. Using onboard alerts and communications, the system notifies the operator and can automatically stop the train when another vehicle is detected, when a red light is present, or when the vehicle is traveling over a specific speed.

Rider Benefits

  • Safety: Reduced risk of train-to-train collision
  • Capacity: Improved travel times from fewer unplanned stops

Program Updates

Learn more about what we've been working on each month.

Past Events

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Downloads

FMCB Presentation (May 20, 2019)

Contact Information

For all queries and comments related to the Green Line Train Protection System (GLTPS), please email GLT@mbta.com

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Recent Updates

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Related Projects

four photos: two construction workers tamping down tracks, a person in a GLT hard hat directing a person in a wheelchair, a new green line train, and a green line trolley car full of riders heading to Park Street. There's a GLT logo banner at the bottom going across all four photos

This project is one of many we're working on to ensure twice as many passengers have access to a safer, more comfortable, and more reliable Green Line by 2030.

Learn more about the Green Line Transformation

Building a Better T

As part of our $8 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.

Learn more

Recent Updates

View all project updates

Related Projects

four photos: two construction workers tamping down tracks, a person in a GLT hard hat directing a person in a wheelchair, a new green line train, and a green line trolley car full of riders heading to Park Street. There's a GLT logo banner at the bottom going across all four photos

This project is one of many we're working on to ensure twice as many passengers have access to a safer, more comfortable, and more reliable Green Line by 2030.

Learn more about the Green Line Transformation