In Ontario, black ice is most likely to form:

Question: In Ontario, black ice is most likely to form:

Answer options:

• At noon ✅ On bridges, overpasses and shaded areas in cold weather
• On dry asphalt
• On gravel

Correct answer: On bridges, overpasses and shaded areas in cold weather

Explanation: Bridges and overpasses freeze first because cold air circulates both above and under the structure, while shaded areas lack the sunlight required to melt frost, making these prime locations for highly dangerous, invisible black ice. Conversely, noon typically provides warmer temperatures that melt ice, while dry asphalt and gravel surfaces lack the moisture needed to form slick ice sheets. Under Ontario’s Official MTO Driver’s Handbook, drivers must look for pavement that looks shiny and black rather than light grey. G1 candidates should expect test questions on these hazardous winter zones to demonstrate safe speed adjustments.