Learners are often told to “check your blind spot” without being shown what the check is supposed to reveal. Effective instruction connects head movement to a specific hidden risk and keeps attention available for the road ahead.
Mirrors do not cover every angle
A vehicle can sit beside a learner outside the view of the centre and side mirrors. Motorcycles and bicycles are particularly easy to miss. South Australia’s Driver’s Handbook highlights the importance of mirror and blind-spot checks before changing lanes, merging or diverging.
Teach the learner to identify the blind-spot area when the car is parked and it is safe to demonstrate. They should understand the reason for the check rather than merely performing a visible shoulder movement for an observer.
The A-pillar creates a different obstruction
The A-pillars are the structural posts on each side of the windscreen. In some vehicles, a pedestrian, cyclist or approaching vehicle can momentarily be hidden behind one during a turn or intersection approach.
A driver can improve visibility by changing their viewing angle with small, deliberate head movements while remaining in control of the vehicle. This should be taught as part of systematic scanning, not an excuse for long periods of looking away from the direction of travel.
Keep the sequence purposeful
Before a lane change, students should build a plan: check traffic ahead, inspect the relevant mirrors, indicate with adequate warning, make the appropriate final blind-spot check, and move only when the lane is safe. The exact timing must suit the road and avoid an unsafe lapse in forward attention.
At an intersection, the emphasis differs. Encourage repeated scans of the relevant approaches and active checks around parked cars, pillars and roadside obstructions before committing.
Common errors
The ceremonial check: The student rotates their head but fails to register whether another road user is present. Ask what they actually saw.
The prolonged check: The learner looks over the shoulder so long that the vehicle drifts or the road ahead is missed. Practise quick, purposeful checks in a low-risk setting.
Trusting an electronic alert: Blind-spot monitoring may help, but it does not remove the driver’s observation and give-way responsibilities.
One look, then a long delay: Conditions change between the check and the manoeuvre. Teach a fresh assessment when the plan is delayed.
A simple debrief question
Rather than asking only “Did you look?”, ask “Which area could you not see in the mirror, and was it clear before you moved?” That question tests understanding and decision-making.
For instructors and training candidates: Explore DAA training and services. DAA provides training and preparation services; it is not the South Australian licensing regulator.
Official sources checked
- South Australian Government official guidance
- South Australian Government official guidance
- South Australian Government official guidance
Related starting material: Happy Driving School original guide / insights. This DAA article is newly written for instructor education, not a republication.
Educational material, reviewed against public guidance on 16 October 2026. Not legal advice or an official competency assessment. Check current legislation, DIT guidance and approved assessment instruments before publication or use in formal assessment.