Ontario G1 Knowledge Test — G1 Practice Question
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Accuracy —
Road Signs
What is the key difference between an orange diamond and a yellow diamond warning sign?
Show Answer & Explanation
Correct Answer: B. Orange warns of temporary conditions (work zones); yellow warns of permanent road conditions
Colour signals the permanence of the hazard. Yellow diamonds = permanent hazard conditions (curves, slippery spots, animal crossings). Orange diamonds = temporary (construction, detours, work zones). The shape is the same — both diamond — but colour tells you whether to expect change after the area.
Why the other answers are wrong
- A.Orange is for regulatory signs; yellow is advisoryBoth colours are warning, not regulatory; regulatory signs use different shapes (octagon, rectangle).
- C.There is no difference; the colours are interchangeableThe colours have distinct meanings under MUTCDC standards and are never interchangeable.
- D.Orange applies to trucks only; yellow applies to all driversWarning signs apply to all drivers; vehicle-specific signs include the truck/bus icon explicitly.