The CHP and the East Palo Alto police dept. both like to troll for speeders among cars coming down off of the Dumbarton Bridge westbound on CA-84. Their favored location is approximately 0.7 mi west of the transition from bridge to surface road, in the turn-off area used mostly by CHP, emergency-services and CalTrans vehicles.

You can frequently spot a cop running radar with his car backed up to face traffic directly next to the first large sign after coming off the bridge, on the right of the road. An alert motorist can easily spot a cruiser parked in this location while driving down the last few hundred feet of the bridge, well before radar is a threat.