In addition the Bay Area-wide traffic impacts of a possible BART strike starting Sunday, travelers in San Francisco may be affected by two major ramp closures south of the Golden Gate Bridge.

Caltrans is beginning pre-construction for the Doyle Drive project to rebuild the 1.5-mile southern approach to the Golden Gate Bridge that has been deemed seismically and structurally deficient.

As part of the rebuild, two Doyle Drive/Highway 101 off-ramps leading to southbound state Highway 1 — also known as the Park Presidio and going south through the city to 19th Avenue–will be closed for four weekend mornings beginning next week.

The closures will take place Saturdays and Sundays, from 5:30 a.m. to 11:30 a.m., on Aug. 22 and Aug. 23, Sept. 12 and Sept. 13, Sept. 19 and Sept. 20 and Sept. 26 and Sept. 27. The ramps will not be closed Labor Day weekend.

Heading south from the toll plaza, the off-ramp to southbound state Highway 1 will be closed, and heading north from the Marina District to the toll plaza, the off-ramp to southbound state Highway 1 will also be closed.

Drivers heading south of the toll plaza and looking to get to Highway 1 will be directed by detour signs to continue on Doyle Drive, take Lombard Street to Van Ness Avenue, and then take Geary Boulevard to Highway 1/19th Avenue.

Drivers heading north toward the toll plaza and seeking to exit onto Highway 1 will be directed past the closed off-ramp to the last exit before the toll plaza, and to take Lincoln Boulevard to 25th Avenue, and then Geary Boulevard to Highway 1/19th Avenue.
More information and maps are available at

The ramp closures will allow Caltrans workers to clear trees in preparation for construction to begin this fall.

Officials hope to complete the new Doyle Drive, to be called the Presidio Parkway, by 2013. The project’s cost has been estimated at $1.05 billion.

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