On Friday night, May 13, Caltrans will close State Route 12 at the Laguna de Santa Rosa Bridge in order to shift traffic to the first half of the new bridge. During this work, residents may notice increased noise from construction and mandatory backup alarms.

One-way Traffic Control will begin at 8 p.m. and continue until 10 p.m. on Friday night, May 13.

The full closure of SR 12 at the Laguna de Santa Rosa Bridge will begin Friday night, May 13, at 10 p.m. and continue until Saturday morning, May 14, at 7 a.m.

During the full closure, SR 12 between Morris Street and the Laguna de Santa Rosa Bridge and between Llano Road and the Laguna de Santa Rosa Bridge will only be open to local traffic.

Detour for eastbound SR 12 traffic: Go northbound on Petaluma Avenue, left on McKinley Street, right on North Main Street, left on Route 116/Healdsburg Avenue, right on eastbound Occidental Road, right on southbound Fulton Road, and return to SR 12.

Detour for westbound SR 12 traffic: turn right on Fulton Road, left on Occidental Road, left on SR 116 (North Gravenstein Highway), right on North Main Street, and return to SR 12.