July 31, 2012 > Dumbarton Bridge closure Labor Day weekend Dumbarton Bridge closure Labor Day weekend Submitted By Effie Milionis The entire Dumbarton Bridge will be closed during Labor Day weekend - September 1-3 - to complete another major element of the seismic retrofit project. Over the three-day closure, Caltrans will replace the expansion joint on the eastern side of the bridge across all six lanes of traffic. During the closure, motorists are encouraged to take public transit or alternate driving routes. Motorists should allow extra time for travel and use other bridges, including Highway 237 and Hwy 92 via the San Mateo Bridge. For the past few months, nightly lane closures have allowed crews to access inside and underneath the bridge deck to complete work while traffic continues to flow overhead. The first full closure of the bridge occurred over Memorial Day weekend 2012, when crews replaced the western expansion joint. Pre-closure activities for the upcoming closure will continue until Labor Day weekend 2012. Get the latest construction and closure updates at DumbartonBridgeInfo.org, and the latest information on transit and transportation options at 511.org.