From 25th Street north to Brannan Street, Caltrans is retrofitting freeway columns and footings. There will be some local impacts and frequent ramp closures on Mariposa Street. Work will require some lane closures during the day, usually not at peak hours. Caltrans is seeking city approval to do some of the work during nighttime hours. Doyle Drive Caltrans is doing a seismic upgrade on the elevated portion of Doyle Drive leading to the Golden Gate Bridge.
Most work is below roadway level, resulting in minimal traffic impacts.
The full retrofit would be completed as federal funds become available. With virtually all retrofit work taking place below the roadway level of the bridge, no major traffic impacts are expected. Corte Madera Creek bridges at Sir Francis Drake Boulevard in Marin County. Funded primarily by Contra Costa County Measure C funds and Regional Measure 1 bridge toll funds, the 7.5-mile project is due to be completed this summer. Construction-related traffic impacts are expected to be minimal.