MBTA Lifts Speed Restrictions on Orange Line Between Assembly and North Station
The MBTA announced that Orange Line trains can now travel at 55 mph between Assembly and North Station, eliminating previous slow zones. This follows similar upgrades between Oak Grove and Assembly in 2025. Officials claim this results in 76% more service and shorter trip times compared to winter 2023.
Key points
- Speed limit increased to 55 mph between Assembly Station in Somerville and North Station in Boston.
- Slow zones were removed following track repairs and signal upgrades.
- This update complements the 55 mph limit already in effect between Oak Grove and Assembly since August 2025.
- MBTA General Manager Phil Eng stated riders will see 76% more service on weekdays compared to winter 2023.
- The improvements are attributed to the 2023-2024 Track Improvement Program and new infrastructure investments.
Background
In August 2025, the MBTA implemented similar speed increases between Oak Grove and Assembly. The current update completes the high-speed corridor for the northern section of the Orange Line. Previous infrastructure projects have focused on reliability and safety, with this latest phase targeting efficiency and frequency.
How outlets are covering it
WCVB and NBC Boston report the news as a direct result of completed track work and signal upgrades, citing MBTA General Manager Phil Eng. NBC Boston specifically highlights the 2023-2024 Track Improvement Program as the primary driver. Universal Hub frames the update as a culmination of track repairs, signal upgrades, and new trains, noting the 76% increase in service. All sources agree on the 55 mph speed limit and the elimination of slow zones, though NBC Boston provides more detail on the specific infrastructure program responsible.
Why it matters
Faster transit times and increased service frequency directly impact daily commutes for thousands of residents in Boston and Somerville. It represents a tangible outcome of long-term infrastructure investments aimed at improving reliability and reducing congestion on the MBTA system.
What to watch
The MBTA has indicated it will continue building on this progress to deliver better service across the entire system. Riders should expect immediate changes in trip times and service frequency starting Sunday. Future updates may focus on other lines or further infrastructure improvements.
- Massachusetts Bay Transportation Authority increases speed on part of the Orange Line WCVB
- Orange Line trains now running faster north of North Station, MBTA says The Boston Globe
- Orange Line gets closer to Ludicrous Speed Universal Hub
- MBTA Orange line can now hit 55 mph for stretch from Boston to Somerville NBC Boston
- MBTA increasing speeds on parts of Orange Line after track improvements Yahoo
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