CHP is patrolling heavily on the approach to the bridge, the bridge itself, the transition from 580 to 101, and on 580 on the Richmond side of the bridge. If heading west on the bridge, be careful as you pass under the Sir Francis Drake overpass–CHP is likely to be hiding on the right shoulder, and will see you before you see him. Limit in both directions is 55, and they are enforcing with only a little bit of leeway.