From San Francisco’s Mission Mission, which notes the installation of small mirrors for cab passengers to look at before they open the door:
Oblivious taxi passengers exiting the vehicle have long been a constant menace to cyclists on Valencia and other streets with bike lanes for some time, so let’s hope this addition becomes more widespread and actually encourages clueless folks to check before carelessly flinging open their door!
Cab drivers in San Francisco also receive educational material developed by the San Francisco Bicycle Coalition to remind them of the dooring hazard. The drivers are taught to pull all the way to the curb and instruct their passengers to egress on the curb side.
More –> New cabs come equipped with passenger mirrors to check for cyclists prior to egress. Via Roymeo.