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In South Australia, you may turn left at a red traffic light only when a sign says “Left Turn on Red Permitted After Stopping”. The sign is permission to turn after a complete stop and full give-way check; it is not permission to roll through the intersection.

The rule in one minute

  • No permitted sign: stop behind the stop line and wait for the relevant green signal.
  • Permitted sign present: stop completely at the stop line, check that the turn is safe and give way to all other vehicles and pedestrians.
  • Red left arrow: do not enter the intersection to turn left while the arrow is red.
  • Never rely on memory: follow the sign and traffic signal that are actually present when you arrive.

Think of the permitted sign as a stop-sign procedure at a traffic-light intersection: stop first, then proceed only after every conflict has been checked.

When is a left turn on red legal?

A left turn against a red light is legal only where the specific permitted sign is installed. An empty intersection, light traffic or another driver making the turn does not create permission.

When the sign is present, the official South Australian guidance requires you to stop at the stop line, make sure it is safe and give way to all other vehicles and pedestrians before turning.

Step-by-step driving procedure

1. Prepare early

Check the mirrors, signal left and reduce speed early. Scan the intersection for the permitted sign, the stop line, pedestrian crossings, bicycle movements and traffic approaching from other directions.

2. Stop completely

Stop behind the stop line and as near as practicable to it. The vehicle must become stationary. A slow rolling movement is not a stop.

3. Check pedestrians and cyclists

Look across the pedestrian crossing before concentrating only on traffic from the right. Check for pedestrians entering late, people moving quickly, children, mobility-aid users and cyclists travelling through or beside the intersection.

4. Check every vehicle conflict

Give way to all vehicles that could conflict with your turn. Do not enter a gap that would make another driver brake, slow suddenly or change direction.

5. Recheck and turn smoothly

After waiting, check the crossing and traffic again. Turn into the correct lane at a controlled speed and cancel the indicator after completing the turn.

Red light and red arrow are not the same

A red traffic light means you must not enter the intersection, subject only to the signed left-turn-on-red exception. A red arrow specifically prohibits movement in the arrow’s direction. Stop at the line and wait until the applicable signal permits the movement.

Three practice scenarios

Scenario 1: The road looks empty but there is no sign

You must remain stopped until the signal permits the turn. The absence of traffic does not change the rule.

Scenario 2: The sign is present and a pedestrian is crossing

Stop and remain stopped. The permitted sign does not give you priority over the pedestrian.

Scenario 3: The sign is present but the traffic gap is small

Wait for a clearly safe gap. You are allowed to turn; you are not required to turn immediately. A following driver’s impatience is not a reason to accept an unsafe gap.

Common learner and overseas-driver mistakes

  • Applying a rule from another country and assuming every red light allows a left turn.
  • Looking for traffic but failing to identify whether the permitted sign is actually installed.
  • Rolling across the stop line instead of stopping completely.
  • Looking only to the right and missing pedestrians or cyclists.
  • Stopping with the vehicle blocking the pedestrian crossing or bicycle storage area.
  • Following the vehicle ahead without independently checking the signal, sign and traffic gap.
  • Turning into a gap that forces another road user to react.

VORT and lesson relevance

South Australia’s learner assessment material requires compliance with traffic-light laws, stop lines, observation and the System of Car Control. During lessons and VORT preparation, practise a visible full stop, a deliberate pedestrian scan, a second traffic check after waiting and a calm decision to reject unsafe gaps.

The examiner is assessing lawful decision-making, observation and vehicle control—not whether you can complete the turn as quickly as possible.

Quick self-check

  1. Can I point to the permitted sign?
  2. Have I stopped completely behind the stop line?
  3. Is the pedestrian crossing clear?
  4. Have I checked cyclists and every conflicting vehicle?
  5. Is the gap large enough that nobody needs to react to me?
  6. Can I complete the turn smoothly into the correct lane?

Official references

This article is general learning material. Always follow current South Australian laws, signs, signals and official instructions.

Continue your learning

Need practical help? Book a lesson to practise traffic-light approach, observation, stopping position and safe gap selection with a driving instructor.

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