Ontario Class C Bus key terms

A systematic walk-around and in-cab check of a bus performed before driving, verifying lights, brakes, tires, fluids, emergency equipment, and passenger safety items are present and working.

A written or electronic record completed after each required inspection, listing the items checked and any defects found, signed by the driver and retained by the operator.

Any component that is damaged, worn beyond limits, missing, or not functioning as designed, which must be recorded and either repaired or assessed before the bus is used.

A serious defect listed in regulation that puts a vehicle out of service until repaired, such as a brake failure, steering problem, or broken spring, and must be reported immediately.

A check of the air brake system for leaks, compressor build-up rate, governor cut-in and cut-out, and warning devices, performed as part of the daily inspection and before a trip.

The lever linking a brake chamber pushrod to the brake shoe, whose travel and angle must be checked because excessive travel signals worn brakes or a broken component.

The distance a brake chamber pushrod extends when the brakes are applied; too much travel means the brakes are out of adjustment and stopping power is reduced.

An audible and visual alert that activates when air pressure falls below a set threshold, warning the driver that braking capacity is being lost and a stop is required.

A parking and emergency brake that uses a strong spring to apply the brakes when air pressure is released, so a loss of air pressure automatically stops the bus.

The air-operated canister that converts air pressure into mechanical force to apply the service brake, and that houses the spring for parking and emergency braking.

The measured depth of grooves on a tire, which must meet minimum legal standards; worn tread reduces traction and increases hydroplaning and blowout risk on a heavy bus.

Cuts, bulges, cracks, or exposed cords on a tire's side, any of which makes the tire unsafe and requires the bus to be taken out of service.

A defect serious enough that the vehicle must not be operated until it is repaired, such as a brake or steering failure, and must be reported to the operator.

A marked door, window, roof hatch, or panel designed for rapid evacuation, which must be unobstructed, clearly labelled, and functional on every trip.

Required safety items carried on a bus, such as a fire extinguisher, first aid kit, warning triangles, and a seatbelt cutter, all checked during the pre-trip inspection.

A portable device carried on the bus for fighting small fires, which must be fully charged, securely mounted, and within its inspection date before the trip begins.

A practice exercise in which passengers or students rehearse leaving the bus through emergency exits, so they can act quickly and safely in a real emergency.

A short safety announcement at the start of a trip covering emergency exits, seatbelt use, and onboard rules, so riders know what to do if something goes wrong.

A passenger who remains standing while the bus is moving; standees must be permitted only where allowed and must have a handhold available for safety.

The system of straps, belts, and locks that holds a wheelchair and its occupant in place during travel, checked by the driver before the bus moves.

The safe procedure for deploying, using, and stowing a wheelchair lift or ramp, including setting the parking brake and confirming the area is clear.

A designated area where passengers board or exit the bus, which the driver must approach slowly and keep clear of hazards before opening the doors.

A planned location where students board or leave the bus, requiring the driver to use warning lights, check mirrors, and confirm all children are clear before moving.

The area around a bus where children or pedestrians are hard to see, especially directly in front, behind, and along the sides, requiring extra mirror checks.

A structured scan of the bus's mirrors to monitor blind spots, doorways, and the area around the vehicle before moving, turning, or opening doors.

A quick glance over the shoulder into a blind spot that mirrors do not cover, performed before changing lanes, merging, or pulling away from a stop.

The gap kept between the bus and the vehicle ahead, measured in seconds, which must increase with speed, poor weather, heavy loads, and reduced visibility.

The distance a bus travels from the moment the driver applies the brakes until it stops, growing with speed and load and much longer on wet or icy roads.

The protective margin of empty space kept around the bus on all sides, giving the driver room and time to react to other road users' mistakes.

The techniques used to prevent or recover from a skid, such as easing off the accelerator, steering where you want to go, and avoiding hard braking.

Operating a bus in snow, ice, and cold, requiring slower speeds, longer gaps, gentle controls, and awareness that bridges and shaded areas freeze first.

Fitting tire chains to improve traction on snow or ice, following the operator's rules on when they are required and how to install and remove them.

The required steps at a crossing: stop where required, open the door or window to listen, look both ways, and proceed only when certain no train is coming.

The legal limits on driving time, on-duty time, and required rest periods designed to prevent driver fatigue and keep commercial drivers alert.

A record of a driver's on-duty, driving, and off-duty time for each day, completed accurately and kept available for inspection by enforcement officers.

The maximum total on-duty time a driver may accumulate over a set number of consecutive days before a required reset through sufficient off-duty hours.

Hours when the driver is relieved of all work duties and is free to rest, which count toward required breaks and toward resetting the driver's cycle.

The provincial registration that identifies a bus operator and links its vehicles and drivers to the safety rules and records the carrier must maintain.

An Ontario licence class that allows driving a bus with a seating capacity of 24 or more passengers, excluding a school bus, subject to medical and knowledge requirements.

An air brake endorsement added to a licence after written and practical testing, required to operate a vehicle equipped with an air brake system.