Bus driver film?
I also love the clip of the Bus Driver, cruising down all the Seattle streets
Was this the one with the little girl and boy and the wagon?
A little boy is pulling a red wagon, which is his "bus", complete with a farebox made from an cardboard milk carton. He offers a lift to a little girl, with a fare of 25 cents. The girl scoffs at his "bus", explaining that her daddy is a real bus driver, and has to get up very early in the morning.
The scene shifts to a man in driver's uniform walking at the bus depot in the a.m. It is still dark out. "I'll bet he hates to get up THAT early." says the boy, but the girl says it's OK. He unlocks a bus, gets in the drivers' seat, and tests the door, lights, etc. He then drives the bus out on a route and starts collecting fares in daylight. A lively piano piece played in the background.
Fade back to the boy and the wagon. The girl finally puts a quarter in the milk carton (which makes a sound like a real farebox), then boards the wagon (to the sound of doors and an airbrake "psssh" sound), as the boy pulls the wagon away to the sound of a real diesel bus.
Was this in Seattle? I had always assumed it was New York State by the infrastructural features and the fact that most of the transportation-oriented films they showed were recorded locally.