A bus driver was someone who drove buses for a living.
James Blake and Elias Griffin Jr were bus drivers in 1955 Montgomery, Alabama. Blake would become infamous for his part in Rosa Parks' arrest on 1 December 1955. According to Grace O'Brien, he gave all bus drivers a bad name. (TV: Rosa)
A bus driver was working on Bus 200 during Easter 2009 when it was transported through a wormhole to San Helios. His body caught fire and he was killed after his attempt to return to Earth through the wormhole. (TV: Planet of the Dead)
Graham's friends Kevin and Gabriel were also bus drivers and after Graham asked if they had seen anything strange in Sheffield, the former helped locate a Gathering Coil, while the latter only told him that his wife was going out for karaoke. (TV: The Woman Who Fell to Earth)