Operating Class 1 Vehicles

Operating a truck-tractor and semi-trailer

Size and weight restrictions of commercial vehicles

Commercial vehicles must be not more than following dimensions:
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2,6 metres in width. If the vehicle is wider than 2,05 meters, clearance lights are required. These must be amber in the front and red in the rear
4,15 meters in height from the ground surface
12,5 meters
6.2 meters in wheelbase for a truck-tractor
23 meters overall length for a tractor semi-trailer or truck and towed trailer combination
25 meters in overall length for Transportation Association of Canada (TAC) vehicle combinations consisting of A, B and C trains

No vehicle combination of vehicles will be allowed to operate on a highway if the weight on a tire, axle groups or gross vehicle weight is more that is allowed under Commercial Vehicle Dimension and Weight Regulation (AR 315/2002).

Specialized, oversized or overweight equipment requires a special permit. The permit will have a specific conditions on it. The condition will state:
– the routes you may travel on
– the days and hours of travel
– the type of equipment that must be used
– anything else that is needed to prevent road damage and to ensure safety.

Air Brakes

Detailed air brake information can be found in Air Brake Manual. This manual will be given to you when you complete the Air Brake Practice Program at licensed driving school or certified delivery agent. You must complete the Program in order to obtain the air brake “Q” endorsement on your driver’s licence. This endorsement is required to operate any vehicle with air brakes.
Also you can cheek here: AIR BRAKES

How long does it take to stop a vehicle?

In order to stop a moving vehicle, a driver needs to perform three actions:
See – a hazard
Think – decide to stop
Do – place foot on the brake pedal until vehicle stops

The function of any braking system is to slow the motion of a moving vehicle. Heavy commercial vehicles take more time and more distance to stop than smaller vehicles. more braking force is needed to overcome their weight and forward motion.
The distance a commercial vehicle needs to stop is affected by the following for factors:
Brake condition. All the brakes on a vehicle must share the task in the same way. If one or more brakes are not properly adjusted or maintained, the remaining brakes will have generate more friction. This means that it will take longer to stop the vehicle.

1. Traction. Traction is the function between the road surface and the area where the tire contacts the surface. The amount of traction a vehicle has depends on:
– the condition of road
– how much tire contact there is with the road surface
– the condition and inflation pressure of the tires
– the gross vehicle weight (GVW) of the vehicle
The more traction the vehicle has, the less time and distance it will take to stop. There is most traction just before all the wheels loch up. There is less traction when the wheels are skidding.

2. Weight (GVW). A heavy vehicle, even though it has better traction, needs more time and distance to stop. When the weight is doubled, the amount of force needed to stop the vehicle is doubled, and it will take about twice as long for that vehicle to stop.

3. Speed. The greater the speed, the more time and distance are needed to stop. Doubling the vehicle speed means that for times the braking force is required to bring vehicle to a stop. If both the weight and the speed are doubled, the amount of force required to stop the vehicle will be increased by eight times.

Stopping distance

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