Without an oversize load permit, the tallest your vehicle can be is

  1. 5.00 metres.
  2. 3.75 metres.
  3. 4.15 metres. ✓
  4. 5.30 metres.

Answer: C. 4.15 metres.

Without an oversize load permit, your vehicle and its load may be no taller than 4.15 metres.

Why this is the answer

The truck handbook states that all vehicles, including loads, are limited to a height of 4.15 metres, and it repeats that this is Ontario’s maximum height. The reason given is to keep adequate clearance at bridges and overpasses. That is why the height in the question is the correct ceiling: it matches the handbook’s stated limit rather than a taller figure. If you drive a larger vehicle, the handbook also tells you to know your height and obey clearance signs.

Why the other answers are wrong

Remember it

Picture the clearance sign number: the Ontario truck ceiling is the same 4.15 metres you must know before passing under bridges.

Official handbook: Official MTO Truck Handbook, A and D licence classes and requirements – Size and weight limits for commercial motor vehicles

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.