Section 7: Brakes

Ontario

Vehicle Weights and Dimensions — For Safe, Productive and Infrastructure-friendly Vehicles

Part III — Preconditions for Designated Vehicles or Designated Combinations

7. (1), (2) Revoked: O. Reg. 457/10, s. 7 (1).

(3) The following brake requirements apply to designated tractor-trailer combinations 4, 5, 6, 7 and 15:

1. The semi-trailer service brake system must be constructed so that a single leakage failure in any component of the system, except the tubing or fittings in the control line, does not render the brakes on more than three axles inoperative.

2. The semi-trailer must be equipped with a low air pressure warning system constructed so that, in the event the air pressure in any one of the service brake reservoirs falls below 483 kPa or 70 psi, a red LED warning lamp will illuminate. The lamp must be side-facing, located on the outside of the semi-trailer near the front side marker lamp, within the field of view of the tractor's rear view mirror, and must include a bulb check feature.

3. The semi-trailer supply and control gladhands must be equipped with screens that will prevent any particle larger than 0.33 millimetres or 0.013 inches from entering the gladhand beyond a point where it remains visible from the opening. A label indicating that the vehicle is equipped with gladhand screens and stating that the gladhand screens must be inspected regularly and kept clean to prevent brake system malfunction must be placed adjacent to the gladhands.

4. The semi-trailer must be equipped with an antilock brake system that directly or indirectly controls each wheel of the semi-trailer.

5. The semi-trailer must display a clearly visible label with the name and telephone number of the semi-trailer manufacturer and the appropriate brake system circuit diagram number. O. Reg. 413/05, s. 7 (3); O. Reg. 457/10, s. 7 (2).

© Queen's Printer for Ontario, 2012-2021. The text is not the official version of Ontario's Highway Traffic Act or associated regulations. For official text, refer to www.ontario.ca/laws.