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MBTA raises Orange Line speed limit to 55 mph between Assembly and North Station

MBTA raises Orange Line speed limit to 55 mph between Assembly and North Station

Built World Boston, MA local

The boost completes a speed upgrade on the line's northern half, capping years of track, signal, and fleet work.

Today: 55 mph extends to North Station

Overview

Updated 1 hour ago

Orange Line trains can now hit 55 mph between Assembly and North Station, matching the speed already allowed between Assembly and Oak Grove. The limit was 40 mph as recently as 2025.

The higher speed is the payoff of a program that replaced track, signals, and the entire fleet. General Manager Phil Eng says riders get shorter trips and 76% more weekday service compared to winter 2023, when slow zones choked the line.

Why it matters

Faster trains mean shorter commutes and 76% more weekday service than during the slow-zone era — a concrete return on state infrastructure spending.

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Key Indicators

55 mph
New speed limit on northern Orange Line segments
Up from a systemwide 40 mph cap; applies between Oak Grove and North Station.
76%
Increase in weekday service vs. winter 2023
More trains running per weekday than during the slow-zone peak, per MBTA.
152
New Orange Line vehicles ordered
Includes 32 cars added to the fleet; the rest replace the old fleet.
$295.5M
Signal upgrade budget (Orange and Red lines)
Funding for replacing analog signals with digital infrastructure on both lines.
220+
Speed restrictions removed in Track Improvement Program
The 2023-2024 program also replaced 250,000 feet of rail systemwide.

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People Involved

Phil Eng
Phil Eng
MBTA General Manager and CEO
Leading the Orange Line Program
 Maura Healey
Maura Healey
Governor of Massachusetts
In office
 Monica Tibbits-Nutt
Monica Tibbits-Nutt
Massachusetts Transportation Secretary and CEO
In office

Organizations Involved

Massachusetts Bay Transportation Authority
Massachusetts Bay Transportation Authority
Public transit agency
Owner and operator of the Orange Line

The state agency that runs Boston's subway, bus, commuter rail, and ferry systems.
OL
Orange Line Program
Capital improvement program
In progress

The MBTA's portfolio of projects to modernize the 120-year-old Orange Line.

Timeline

September 2022 October 2026

5 events Latest: Today
Tap a bar to jump to that date

  1. 55 mph extends to North Station

    Today Infrastructure

    Signal and track upgrades let trains run 55 mph between Assembly and North Station.

  2. Orange Line reaches 55 mph for first time

    Infrastructure

    Trains hit 55 mph between Oak Grove and Assembly, up from a 40 mph cap.

  3. MBTA clears all speed restrictions

    Infrastructure

    Track program replaces 250,000 feet of rail and lifts 220+ speed restrictions systemwide.

  4. Slow zones at their worst

    Infrastructure

    Winter 2023 marks the peak of the slow-zone era, with crawling trains and reduced service across the system.

  5. Orange Line shutters for 30-day emergency repair

    Infrastructure

    After a federal safety inspection, the MBTA closes the entire Orange Line for track and signal repairs.

Scenarios

1

Orange Line Program completes as promised

Likely Resolves by Jan 31, 2028

Discussed by: MBTA 5-year capital plan and its Orange Line Program project page

The digital signal replacement, 152-vehicle fleet, and traction power substation upgrades finish and are marked complete on the MBTA's project page. The 32 additional cars enter service, and the line's modernization pays off in sustained frequency and speed. This is the program's stated trajectory.

2

55 mph spreads to the line's southern half

Possible Resolves by Q2 2028

Discussed by: Transit planners noting the tighter curves and closer station spacing south of North Station

The MBTA raises speed limits on some segments south of North Station — through downtown and toward Forest Hills — where track geometry allows. Full 55 mph systemwide is improbable because of curves, but partial increases are plausible as the signal and track work continues.

3

Speed gains reversed by new slow zones

Unlikely Resolves by Oct 18, 2028

Discussed by: Skeptics recalling the T's past reform-then-decline cycles

A defect, signal failure, or maintenance backlog forces the MBTA to re-impose speed restrictions on segments that currently allow 55 mph. The service and travel-time improvements announced in 2026 erode, echoing the post-2015 pattern where fixes faded within a few years.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

September 2022

Orange Line 30-Day Shutdown (September 2022)

A federal safety management inspection found deteriorating track and signals throughout the MBTA. The agency shut the entire Orange Line for 30 days, from September 19 to October 18, doing what it said was two years' worth of track maintenance in one month.

Then

The line reopened on schedule, and the shutdown became a public symbol of how broken the T had become.

Now

It cleared a backlog of track work, laying the foundation for the speed increases that followed.

Why this matters now

The 2022 shutdown is the low point from which the current speed gains were built — the track work done then is part of why trains can run 55 mph now.

January-February 2015

MBTA Winter Crisis (2015)

Record snowfall paralyzed the MBTA for weeks — trains stalled, service was suspended, and the system effectively shut down. The general manager stepped down and the state created a Fiscal Management and Control Board to oversee spending and reform.

Then

The state committed new funding and leadership changed, and T reliability improved for a time.

Now

By 2022, federal inspectors found the system's infrastructure had decayed again, setting up the slow zones this program removes.

Why this matters now

It is the cautionary tale for the current effort — whether the fixes stick or the system slides back into slow zones is the open question.

Sources

(4)
Universal Hub WCVB Metro Magazine MBTA