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Red and Orange Line Signal Upgrades

Updated on June 10, 2019

Orange Line train on tracks

About the Project

Timeline: 2015 – 2022

We’re upgrading the signal system on the Red and Orange lines. The new, digital signal infrastructure will support new Red Line and Orange Line vehicles being brought into service and allow for more reliable service. 

Work is being done alongside infrastructure and maintenance equipment upgrades at Cabot Yard and Wellington Yard as part of the Red Line and Orange Line improvement programs. 

Why We're Doing This Work


ProjectProject Substantial Completion
ProjectOrange Line signal enhancementsProject Substantial CompletionSummer 2019
ProjectRed Line signal enhancementsProject Substantial CompletionFall 2019
ProjectRed Line signal upgradesProject Substantial CompletionWinter 2022
ProjectOrange Line signal upgradesProject Substantial CompletionSpring 2022

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Contact Information

For all queries and comments related to Red and Orange Line Signal Upgrades, please contact