ME CDL School Bus key terms

A systematic check of a school bus performed before driving, covering tires, brakes, lights, mirrors, emergency equipment, and fluids, intended to catch defects that could cause a breakdown or crash.

A test of an air-brake system that confirms adequate pressure buildup, no excessive leakage, and proper warning signals before the bus is placed in service.

The linkage that connects a brake chamber pushrod to the brake shoe; excessive travel means the brakes are out of adjustment and the bus must be taken out of service.

Loss of stopping power that occurs when brakes overheat from repeated or prolonged use, often on long downgrades, causing the pedal to feel soft and stopping distance to grow.

A green traffic signal that has been green for a long time and may change before the bus reaches it, requiring the driver to prepare to stop rather than accelerate.

The gap in seconds between the bus and the vehicle ahead, measured by counting after the lead vehicle passes a fixed point; larger gaps are needed at higher speeds or in poor weather.

The area immediately around a stopped school bus, generally ten feet in every direction, where children are hardest to see and most at risk of being struck.

The blind areas created by a conventional bus's flat hood and long body, including zones directly in front, behind, and along both sides that mirrors cannot fully cover.

Setting crossover, side, and convex mirrors so the driver can see the bus tires, the roadway beside the bus, and the area around the rear door before every trip.

The hinged sign that swings out from the left side of a school bus when it stops to load or unload students, warning traffic in both directions to halt.

The flashing red lights and extended stop arm used while students cross the road; drivers must remain stopped until the lights are turned off and the arm retracts.

The designated curbside area where students board the bus, chosen so students do not have to cross traffic and the bus can stop clear of intersections and hazards.

The ordered steps for letting students off: stop, set the parking brake, secure the bus, signal with lights, and supervise students until they are safely clear of the bus.

Tallying students as they board and leave the bus so the driver knows how many are aboard and can confirm no child remains on the vehicle at the end of the route.

A mandatory walk-through of the bus after every route and trip to find students who may have fallen asleep or been left behind, documented with a signed checklist.

A written record assigning each student a seat, used to control behavior, separate incompatible riders, and identify who was where if an incident must be investigated.

A set of proactive techniques, such as clear rules, praise, and consistent consequences, used to keep order on the bus and reduce distractions for the driver.

The procedure for documenting and forwarding reports of harassment or intimidation among students to school administrators so the behavior can be addressed promptly.

The organized removal of students from a bus during a fire, crash, or other emergency, using doors, windows, and roof hatches under the driver's direction.

Any door, window, or roof hatch designed for rapid escape from the bus, marked with instructions and kept unobstructed so it can be opened quickly.

A portable extinguisher carried on the bus, typically dry chemical, inspected regularly and used only on small fires while students are moved to safety.

A place where a road and railroad tracks intersect at the same level, requiring the bus driver to stop, look, and listen before proceeding across the tracks.

The required routine at a grade crossing: bring the bus to a complete stop, open the door or window to hear, and visually check both directions before crossing.

A barrier that lowers across the roadway at a railroad crossing when a train approaches; a bus must never drive around or under a lowered gate.

A railroad crossing protected only by signs and pavement markings, with no flashing lights or gates, so the driver must rely entirely on sight and hearing.

The outward sweep of the rear of the bus when the front turns sharply, which can strike pedestrians, vehicles, or objects near the rear corner.

The tendency of the rear wheels of a long bus to follow a tighter path than the front wheels, so the driver must swing wider on turns to keep the rear clear.

Loss of tire contact with the road when water builds up under the tires, causing the bus to slide and steering and braking to become ineffective.

The technique of steering in the direction of a skid while easing off the accelerator and avoiding hard braking, used to regain control on slippery surfaces.

The open area around the bus kept free of other vehicles and obstacles so the driver has room and time to react to sudden hazards.

The additional license classification, with written and skills tests, required to operate a school bus legally and to carry passengers safely.

The walk-through completed after a route to check for remaining students, lost items, damage, and mechanical problems, and to secure the bus.

Flashing warning lamps used to alert other drivers when the bus is stopped, moving slowly, or in an emergency, distinct from the red student-loading lights.

A practiced exercise in which students rehearse leaving the bus through a designated exit, teaching them where to go and how to stay clear of traffic.

The hand signal or verbal cue the driver gives students to cross or wait, used together with the stop arm and lights to control movement around the bus.

The document listing stops, times, and student names for a run, which the driver reviews before departure and follows to keep the schedule and stops consistent.

A written notice that a mechanical or safety problem was found on the bus, submitted so the vehicle can be repaired before it carries students again.

The measured thickness of rubber remaining on a tire; below the legal minimum the tire must be replaced because traction and braking are reduced.

The parking or emergency braking system, applied with the bus stopped and secured, that holds the vehicle in place while students board or leave.