Waymo told TechCrunch that they are working on the citations, which can occur for various reasons, such as when the vehicles are waiting for their next customer and briefly park in an illegal zone. They also may sometimes stop in commercial loading zones to drop off customers.

The driverless cars picked up 589 parking tickets in San Francisco and 75 in Los Angeles last year, according to a Washington Post investigation.

Waymo now has more than 300 driverless vehicles zipping passengers around San Francisco, but while they follow traffic laws, parking is another matter

The boring parts of driverless cars are on Aicha Evans’s mind.As we rode through the streets of San Francisco in her company’s autonomous vehicle, we talked through all of the back-end things required to launch a robotaxi service later this year.

San Francisco is a hot spot for Waymo vehicles, which operate without a human driver, but it seems the cars don't always play by the rules.