MBTA "Transformation" (Green Line, Red Line, & Orange Line Transformation Projects)

Does anyone know the percentage of Green Line cars that have been fitted with the GLTPS hardware?
 
As far as I know it's not tracked anywhere public, but anecdotally I see Type 7s with GLTPS hardware installed pretty frequently now. If I had to guess a percentage I would say around 40% of the Type 7s, but I could be wildly off.

They definitely seem to be focusing their installation efforts on the 7s — I've only seen a couple of Type 8s with the hardware and no Type 9s (though I primarily ride the E so I don't see the 9s much).
 
Charlie_mta said:
Come on brothers. Peace be with you.
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There have been delays on the Orange line multiple times in the last week due to signal issues. Didn't they just spend weeks fixing the signal system on the orange line? Why are there still so many issues? Genuine question.
 
Kinopio said:
There have been delays on the Orange line multiple times in the last week due to signal issues. Didn't they just spend weeks fixing the signal system on the orange line? Why are there still so many issues? Genuine question.
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They are not done yet with the signal upgrades. Shutdown in late August will complete most of the missing sections (I believe).
 
Anecdotally, most GL trains I have caught recently have had at least one car with the GLTPS upgrades.
 
The Blue Line seems to have a lot of power issues. Are there still plans to replace the overhead catenary with third rail?
www.wcvb.com

Overhead power problem interrupts MBTA Blue Line service

Problems with the overhead power cables forced a service interruption along the Blue Line starting Thursday night and continuing into Friday morning.
www.wcvb.com www.wcvb.com
Shuttle buses replaced service along part of the MBTA's Blue Line on Thursday night and again on Friday morning while crews worked to repair a problem with overhead power cables.
MBTA officials first announced a power problem between Orient Heights and Suffolk Downs just after 8 p.m. Within minutes, the initial announcement about a delay was updated with the announcement that service would be replaced by buses between Wonderland and Maverick.
That same bus diversion continued into Friday morning and MBTA officials said crews were continuing work on the catenary wires.
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Does anyone know wtf is going on with the Red Line floating slabs? seems like a nearly annual shutdown at this point (either multiple weekends or the current 10-day diversion going on right now). That can't be the normal maintenance cadence when it was initially designed. Will these things just get replaced with normal concrete track bed?
 
sneijder said:
Does anyone know wtf is going on with the Red Line floating slabs? seems like a nearly annual shutdown at this point (either multiple weekends or the current 10-day diversion going on right now). That can't be the normal maintenance cadence when it was initially designed. Will these things just get replaced with normal concrete track bed?
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Its been an annual tradition for well over a decade at this point, why stop the party?
 
I don’t think it can be replaced with normal ballasted track without substantially reworking the tunnels.

The slabs need routine maintenance and eventual replacement. The T historically has been bad at routine maintenance. Replacement is not conducive to overnight work, due to the long cure time. During the Pioneer-led weekend shutdowns they would cast-in-place a few slabs per weekend. This time, it appeared that they were stacking pre-cast elements at Porter, so they might have figured out a way to maximize the number of slabs.
 
sneijder said:
seems like a nearly annual shutdown at this point (either multiple weekends or the current 10-day diversion going on right now).
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Last full shutdown for the floating slab section of the RL was 2 years ago in November 2024. They kind of held of during covid for the succession of three-day-weekend shutdowns from Harvard to Alewife. I don't recall that being a thing at all since 2019, but, it may have slipped my mind.

The other RL shutdowns since November 2025, in my recollection, were signals related on the Braintree and Ashmont branches and one in the downtown tunnel which I don't know what they did but the tracks are running smoother.
 
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