ObservationQuestion 22 of 78
Why must you do a shoulder check before a lane change?
- Mirrors do not show your blind spots.
- It tells other drivers you will change lanes.
- It makes your car go faster.
- It is only a rule for highways.
Show answer
Correct answer: Mirrors do not show your blind spots.
You must do shoulder checks in addition to mirror checks. This lets you see the areas your mirrors cannot show.
Source: Driver’s Guide: Cars and Light Trucks (Government of Alberta, Spring 2026), Changing lanes, page 73
Practice the topic "Observation"Questions last reviewed: 18 October 2026