The bus is made by Beep, whose vehicles are also used in Yellowstone National Park.Terry Chea/APA driverless bus will run a seven-stop loop around Treasure Island in San Francisco Bay.It can seat up to 10 passengers and will complete the loop every 20 minutes. San Francisco authorities last week allowed driverless taxis to operate 24 hours a day.Just a week after allowing robotaxis to operate around the clock, San Francisco has launched an driverless shuttle bus service.The small box-shaped bus will operate on a fixed route on Treasure Island in San Francisco Bay between 9 a.m.