Must be able to begin in seated position with seat belt fastened, parking brake released, and engine running, secure the bus (parking brake set, key removed), rise from the seat, exit through the rearmost emergency exit, and be in a position to assist passengers in exiting the bus within 20 seconds. The employee is subject to hazards associated and exposure to various hazards such heavy traffic conditions, loud noises, vibration, moving mechanical parts, chemicals, fumes, odors, dusts, mists, gases and oils.