Roof hatches:

Question

On a bus, it is acceptable to lock some roof hatches in a partially-opened position to provide fresh air, but this should not be made a regular practice. Remember that opening these hatches will slightly increase a bus's clearance.

Accepted Answer

May be locked in a partly open position during a drive.

Answer

Must be removed before a bus is driven.

Answer

Must be closed before a bus is driven.

Answer

May be removed during a drive.

Roof hatches:

Wait, before you go