July 2026 - Fall 2027: Broadway Tunnel closures
The Broadway Tunnel is scheduled to be fully closed (one day) from 7 a.m., Sunday. August 16, through 5 a.m., Monday, August 17, then one traffic direction at a time will be closed for approximately 7 months each, with one lane in each direction in the open bore.
The detour maps show LAST viable traffic detour options before the street closure. Please use other alternate routes as early as possible to reduce congestion in the construction area. Refer to regional detours map.
Local detour routes during the full tunnel closure
- Eastbound: Broadway to northbound Larkin Street, eastbound Union Street and southbound Powell Street, returning to Broadway; or Broadway to southbound Larkin Street, eastbound Pacific Avenue and northbound Powell Street, returning to Broadway.
- Westbound: Broadway to northbound Powell or Mason streets, westbound Union Street and southbound Larkin Street, returning to Broadway; or Broadway to southbound Powell Street, westbound Pacific Avenue and northbound Larkin Street, returning to Broadway.
Broadway Tunnel Full Closure - Traffic Detour Plan
Local detour routes during the partial tunnel closure
Following full closure, the project will transition into an approximately seven-and-a-half-month closure of the south (eastbound) tunnel bore. During this phase, the north (westbound) bore will remain open and will be reconfigured from two westbound lanes to one lane in each direction. Afterward, the north (westbound) bore will close for approximately seven months, and the south bore will be converted to one lane in each direction.
Broadway Tunnel Partial Closure – Traffic Alternative Routing Plan
Regional Alternate Routes
Regional Alternate Routes
For drivers traveling longer distances, several alternate routes have been identified to bypass the closure area.
- Eastbound Broadway → to Northbound Franklin Street → to Eastbound Bay Street → to Southbound Columbus Avenue → to Southbound Powell Street → to Broadway
- Eastbound Lombard Street → to Northbound Van Ness Avenue → to Eastbound Bay Street → to Southbound Columbus Avenue → to Southbound Powell Street → to Broadway
- Northbound Van Ness Avenue → to Eastbound Bush Street → to Northbound Kearny Street → to Broadway
- Northbound Van Ness Avenue → to Eastbound Bay Street → to Southbound Columbus Avenue → to Southbound Powell Street → to Broadway
- Westbound Broadway to Northbound Columbus Avenue → to Westbound Bay Street → to Southbound Van Ness Avenue → to Broadway
- Northbound Embarcadero → to Westbound Bay Street → to Southbound Van Ness Avenue → to Broadway