(a) Every school bus shall be operated at a safe rate of speed, consistent with the volume of traffic, intersections, curves, railway crossings and any other condition requiring special caution. The maximum speed shall not exceed fifty miles per hour on divided limited access highways and forty miles per hour on all other highways or, where highway signs indicate lower speeds, shall not exceed such posted speed limits.

(b) Each school bus and student transportation vehicle shall display lighted head lamps while transporting school children.

(c) Violation of any provision of this section shall be an infraction.