Ontario G1 Test Coach
Traffic lights and markingsQuestion 74 of 328
A traffic light with an extra round signal on top that shows a white vertical bar on a black background

What does the round signal on top of this traffic light mean?

  1. Only buses may park here
  2. A school bus is stopped ahead
  3. Transit vehicles must yield to all traffic
  4. Transit vehicles may go and other traffic faces red
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Correct answer: Transit vehicles may go and other traffic faces red

This is a transit priority signal. Buses and similar vehicles may go or turn while all other traffic faces red.

Source: The Official MTO Driver's Handbook (Ontario Ministry of Transportation), Traffic lights, Transit priority signals

Practice traffic lights and markings

Questions last reviewed: 18 October 2026