Having little to no responsibility for long periods of time would result in a driver filling the time with other activities, like phone conversations. A frighte

Having little to no responsibility for long periods of time would result in a driver filling the time with other activities, like phone conversations. A frightening number of cabbies blabber on the phone already. It's doubtful their reaction time to take control would be quick enough. We should be looking at occupations that require people being alert but not engaged for a glimpse into drivers' behavior.