A bus driver must sound the horn before departure unless a safety check was completed immediately before, but when a conductor is on duty, the driver must absolutely never depart without the conductor's signal.

Answer: False

Explanation

The Rules of the Road state that when a conductor is on duty, the driver "departs upon the conductor's signal," but the expression "absolutely never" is excessive. Additionally, regarding horn use in the first part, if a safety check can be completed immediately before departure, it is an exception and the horn does not need to be sounded.