The California Legislature passed a bill this month to require human safety drivers in heavy-duty robot trucks for at least the next five years.
On Friday, Gov. Gavin Newsom killed it.
"Considering... the existing regulatory framework that presently and sufficiently governs this particular technology, this bill is not needed at this time," the governor said in a veto message.
The bill was sponsored by the Teamsters union and backed by highway safety advocates. Opponents included driverless technology companies, Silicon Valley lobbyists, and various chambers of commerce and business leadership groups. Supporters focused on safety and jobs, opponents on business growth and technological progress.
Read more: Driverless trucks on California highways? Legislators don't trust the DMV to ensure safety
Even with strong business backing, the Legislature passed the bill with bipartisan support: 105 legislators voted in favor, six voted no and nine members sat it out.
The bill had been introduced by Assemblymember Cecilia Aguiar-Curry (D-Winters), who said Friday she is "deeply disappointed" with the veto. She said characterization of the bill as a "ban" on autonomous trucks, as the driverless vehicle industry has done, was a "disheartening mischaracterization." She said she hopes the Legislature and the governor "will have a truly meaningful process to protect the public and working people going forward."
With the Legislature out of the picture, at least for now, the California Department of Motor Vehicles will decide when self-driving trucks weighing 10,000 to 80,000 pounds when full can hit the road in California with no human aboard.
Legislative dissatisfaction with the DMV played a big role in the debate. "The DMV has not done a great job of regulating this space," Assembly Transportation Committee Chair Laura Friedman (D-Glendale) said at bill hearing in May.
Legislators and city officials in Los Angeles, San Francisco and Santa Monica have complained about lax enforcement of autonomous vehicles by the DMV, which they believe puts business interests ahead of traffic flow and public safety. The issue came to a head this year when San Francisco's fire chief and other emergency responders raised an alarm about robot taxis interfering with emergency responders, and the failure of the companies to move them out of the way in timely fashion.
Read more: San Francisco's fire chief is fed up with robotaxis that mess with her firetrucks. And L.A. is next
The Legislature itself in 2021 put all power over autonomous vehicle safety in the hands of the DMV. Robotaxi fares are regulated by the California Public Utilities Commission. Newsom appointed DMV Director Steve Gordon, a Silicon Valley businessman, to his post. Newsom also appointed all five California Public Utilities Commission members, including John Reynolds, formerly chief counsel for Cruise, one of the robotaxi companies that has drawn emergency responder ire.