google s driverless company, waymo, to expand their fleets to 24 hours of operation a day. i m seeing at least one incident a day now with autonomous vehicles. reporter: the approval came despite long standing concerns from first responders here. when a fire department has to roll out on a call like this, if they can t get to a fire in time, every minute that goes by, the fire can double in size. the technology is not ready for prime time > reporter:r: incidentsts lis collisioion with a c city bus he fufueled crititicism and although driverless car companies have touted their relative safety benefits, a recent nbc news investigation found that in california, driverless cars had been involved in 280 crashes over the past five years, though it was not clear in how many cases the autonomous vehicle was at fault. you can see there s like one, two, three, four cruise cars blockiking no onene can get t through. reporter: the very day after california approved the expanded use of d