Cambridge Street Tunnel Westbound Closure August 27

On Wednesday, Aug. 27, the westbound side of Cambridge Street Tunnel (traveling towards Harvard Sq./Mass Ave) will be closed from 4 a.m. - 4 p.m. as the City’s contractor, MIG Corporation, will be pouring a portion of the new concrete flooring in this portion of the tunnel. 

Motorists travelling in the eastbound lanes will not be impacted.

Link to Detour Map.