Dumbarton Bridge Slated for Closure Over Memorial Day Weekend

Drivers are encouraged to use the San Mateo Bridge instead.

The California Department of Transportation is advising motorists that the Dumbarton Bridge will be closed over Memorial Day weekend.

The Dumbarton Bridge will close in both directions between the University Avenue/Bayfront Expressway interchange in Menlo Park and the Thornton Avenue/Paseo Padre Parkway interchange in Newark, from 10 p.m. Friday, May 25 until 5 a.m. Tuesday, May 29.

During the closure, crews will elevate the bridge and replace the seismic joint at Pier 16 as part of the Dumbarton Bridge Seismic Safety Project, according to Caltrans officials.

All motor vehicle, pedestrian, and bicycle traffic will be prohibited from the bridge during this operation. Upon reopening, traffic will not experience any alignment changes.

The San Mateo Bridge and its connections with U.S. Highway 101 and Interstate Highway 880 will remain open to motorized traffic, though drivers should allow extra travel time.

How You Can Plan Ahead: Alter Your Travel Plans

Drivers should expect potential delays in the vicinity of the Dumbarton Bridge over Memorial Day weekend. It is recommended that you allow extra time for travel, use public transit where possible, telecommute, or form a carpool. For those who must drive, use recommended detour routes.

What to Expect When the Dumbarton Bridge Reopens

Drivers, bicyclists, and pedestrians will not experience any differences on the bridge after it reopens. As the Seismic Safety Project continues, there will be ongoing overnight lane closures on the bridge through the summer.

Detour Information

To detour around the Dumbarton Bridge, use alternate bay bridges or use routes through the San Jose area. I-880, Hwy 101, Hwy 237, Hwy 92, the San Mateo Bridge, and the Bay Bridge will remain open during the closure.  However, motorists should allow extra travel time and expect potential delays.

To see the detour routes and map, click on the image attached to this article.

North Detour
Traffic should use Hwy 92 / the San Mateo Bridge as an alternate connector between the East Bay and the Peninsula. From Menlo Park, eastbound traffic should take Hwy 101 north and then Hwy 92 east over the San Mateo Bridge. From Newark and Fremont, westbound traffic should take I-880 north to Hwy 92 west over the San Mateo Bridge.

South Detour
Traffic can use Hwy 237 through the South Bay as an alternate connector between I-880 and Hwy 101. From Menlo Park, eastbound traffic should take Hwy 101 south and then Hwy 237 east toward Milpitas. From Newark and Fremont, westbound traffic should take I-880 south and then Hwy 237 west toward Sunnyvale.

Avoid traffic jams. Caltrans expects potential delays at the Hwy 92/101 junction in Foster City and at the Hwy 92/880 junction in Hayward. The San Mateo Bridge, Hwy 237, and the portions of I-880 and Hwy 101 that connect these two routes will also be potentially affected by heavier-than-usual traffic. Even the Bay Bridge may be affected.

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