Will driverless buses be accepted sooner than driverless cars?

Driverless cars have been in the news for quite some time. Last September, I speculated in PC 360, an insurance trade magazine, that insurance premiums for autos could decrease by as much as 40% over the next five years as autonomous cars made travel much safer. I increased my estimate to a 75% decrease in insurance premiums by extending the timeline to 15 years. When I wrote those two articles, I remember thinking how much of a personal paradigm shift was needed to accept a driverless car as safe. Now, it appears that driverless buses are in the near future as well.