Truck and trailer rules in Ontario: licence, carrier registration and inspections

This page reports what the official source says. It is not legal advice: ask the office named here. The sources are the Ontario government CVOR page and the Ministry of Transportation (MTO) Truck Handbook. Federal background and the other places are on the parent page, trucks and trailers for tree work. Licence classes by weight in Ontario are on driving the chip truck, and this page does not repeat them.

At a glance

Item	What the sources say
Agency	Ontario Ministry of Transportation
Carrier registration	Commercial vehicle operator's registration (CVOR) certificate
Weight line for a CVOR	Trucks with a registered gross weight or actual weight over 4,500 kg
Trailer counted in registered gross weight	Trailer and load weighing more than 2,800 kg
Annual inspection	Each vehicle and trailer, by a licensed motor-vehicle inspection mechanic
Hours of service	Apply to commercial vehicles over 4,500 kg
Trailer brake weight	Not published on the pages read

The CVOR certificate

The CVOR page says that anyone operating a commercial vehicle in Ontario needs a valid CVOR certificate, and that the certificate or a copy is carried in each commercial motor vehicle run under it. The program tracks fleet size, kilometres travelled, violation rate, safety rating, convictions, reportable collisions, safety inspections and ministry interventions. The page lists who needs one when the vehicle is plated in Ontario, the United States or Mexico: trucks with a registered gross weight or actual weight over 4,500 kg, including trucks with farm plates, buses seating 10 or more, concrete pumps and mobile cranes other than off-road mobile cranes, tow trucks, and any motor vehicle designed or equipped to tow another motor vehicle.

It lists vehicles that do not need one, among them trucks and buses plated in another Canadian province or territory, which need a safety certificate from the province or territory where they are plated, and trucks other than tow trucks with a registered gross weight or gross weight of 4,500 kg or less, whether or not they tow a trailer. A pickup used for personal purposes without pay is exempt only if it has a manufacturer's gross vehicle weight rating not over 6,500 kg, an unmodified original box or a matching replacement, and no trailer carrying commercial cargo, tools or equipment. See the Ontario CVOR page, last updated February 9, 2026.

Trailers and registered gross weight

The same page says a trailer and its load count toward the vehicle's registered gross weight if they weigh more than 2,800 kg (6,171 lb). If the trailer and load weigh 2,800 kg or less, the registered gross weight is the truck and its load alone. Weights are taken with the trailer attached. The CVOR operator is described as responsible for driver conduct, vehicle condition, daily and annual inspections, hours of service records, cargo securement, weights and dimensions. Every operator is rated Satisfactory, Satisfactory unaudited, Conditional or Unsatisfactory, and the rating is public. Interventions listed run from letters and audits to fleet size limits, plate seizure and suspension or cancellation of operating privileges.

Papers, stations and inspections

The handbook page on vehicle safety and daily inspections says truck inspection stations check weight, height, length, width and axle spacing, and driver licences for validity and class. It lists what a driver of a commercial vehicle should carry and surrender on demand: a valid licence of the right class, the registration for truck and trailer, the CVOR certificate or a true copy, an original insurance certificate, a daily inspection report completed within 24 hours with the inspection schedule, a daily log for the day and the previous fourteen days, and supporting documents. A driver directed to work within a 160 km radius of where the day starts and to return there may be exempt from carrying a daily log but still follows hours of service. A refusal to go to a weigh scale is an offence with a fine up to CA$20,000 under section 124(5) of the Highway Traffic Act, plus a licence suspension of up to 30 days. Obstructing a weighing or refusing to redistribute a load carries CA$200 to CA$20,000 under section 124(6).

The page says operators are responsible for having each vehicle and trailer inspected each year by a licensed motor-vehicle inspection mechanic against National Safety Code Standard 11, Part B, with a certificate and a decal showing the vehicle type and the month and year. It adds that Ontario has adopted National Safety Code Standard 10 on cargo securement, that a load overhanging the rear by 1.5 metres or more is marked with a red light after dark and a red flag or marker otherwise, and that cargo is re-inspected on a change of duty status, after three hours of driving or after 240 km, whichever comes first. See the handbook page on vehicle safety, updated September 11, 2026.

Hours of service

The handbook's hours of service page says the rules apply to drivers of commercial motor vehicles with a gross or registered gross weight over 4,500 kg. Exempt vehicles include those of 4,500 kg or less, two- or three-axle commercial vehicles carrying primary farm, forest, sea or lake products, tow trucks, and pickups used for personal purposes with a manufacturer's rating of 6,000 kg or less. The daily limits it states are 10 hours off duty in a day, no more than 13 hours of driving, and no driving after 14 hours on duty, with exceptions in Ontario Regulation 555/06. See the handbook page on hours of service.

Coupling steps in the handbook

The handbook's coupling steps for combinations, listed for Class A, include connecting the safety chains or cables crossed, checking that the coupling device is locked with secondary locks secured, connecting air and electrical lines, and connecting a breakaway device if equipped. The pages read give no trailer weight above which brakes or a breakaway device are required. Width, length and oversize permit limits are not on the pages read.