Gas leak near Mass General Hospital triggers road restrictions, rerouted traffic, and safety monitoring in Boston

Traffic restrictions implemented near the hospital campus

Boston transportation and public safety officials have implemented traffic changes near Massachusetts General Hospital (Mass General) after an underground utility emergency in the West End left the area operating under temporary restrictions. The most significant impacts have been concentrated along Cambridge Street and adjacent routes that serve the hospital, Bowdoin Square, and event traffic associated with the TD Garden.

City notices in late January 2026 stated that Cambridge Street westbound was closed from Staniford Street to Bowdoin Street during the initial response period, with drivers advised to avoid the corridor and use alternate routes. Subsequent updates described a reconfigured traffic pattern designed to preserve access to Mass General and other critical infrastructure while repair work continued.

What is known about the utility emergency

Public statements tied the traffic changes to a manhole fire and related underground utility work in the Cambridge Street–Staniford Street area. Emergency responders were dispatched to the location during the morning of January 30, 2026, and crews remained on scene for an extended response and stabilization period. The incident coincided with power disruptions affecting several hundred customers in the surrounding neighborhood.

While the original alert that prompted road changes was described as a public safety emergency linked to underground infrastructure, officials did not publicly attribute a single cause across all impacts (traffic, power, and utility repairs) beyond the immediate manhole incident and subsequent stabilization and repair operations.

How traffic is being managed and what drivers should expect

Boston Police outlined interim traffic controls that included shifting two-way travel onto the outbound side of Cambridge Street to keep the corridor functioning under constrained conditions. Additional changes included restricting turns at key intersections, including making Joy Street left-turn-only at Joy Street and Cambridge Street during the modified pattern.

Drivers were warned to expect backups and periodic delays on streets feeding the hospital area, including Staniford Street, Blossom Street, O’Connell Way, and approaches near the Longfellow Bridge. Officials also noted that TD Garden events can intensify congestion and pedestrian volumes, affecting both travel time and intersection operations.

Safety guidance and what residents should do if they suspect a leak

State safety guidance for suspected natural gas leaks emphasizes leaving the area and contacting emergency services if gas is smelled inside a building. For odors outdoors, residents are advised to contact the utility provider or call 911 when the provider is unknown.

• Avoid the Cambridge Street–Staniford Street corridor when possible and allow extra time for hospital trips and crosstown travel.
• Follow posted detours and temporary turn restrictions, which may change as repairs progress.
• If you smell gas indoors, evacuate and call 911 from outside; avoid using switches, appliances, or open flames.

Officials have framed the reconfiguration as a measure to maintain access to Mass General while crews complete work to make the area safe and restore normal operations.

City agencies have indicated that the restrictions are temporary and tied to ongoing safety and repair assessments in the affected underground infrastructure zone.