SA theory test traffic lights and signs practice questions

Question 1

A traffic light turns yellow as you approach and you have room to stop safely. What must you do?

• Accelerate to clear the intersection
• StopCorrect answer
• Stop only if there is cross traffic waiting
• Continue through at the same speed

Yellow means stop. Continuing is permitted only when you are too close to pull up safely.

Rule cited: Australian Road Rules r 57, as adopted in South Australia

Question 2

May you make a U turn at traffic lights in South Australia?

• Only between 10 am and 3 pm
• Only where a U TURN PERMITTED sign is displayed
• Yes, unless a NO U TURN sign is displayed at the intersectionCorrect answer
• No, U turns at traffic lights are always banned

South Australia allows U turns at traffic lights unless a sign prohibits them. You must still start from the correct position and give way to everyone.

Rule cited: The Driver's Handbook (South Australia), topic: U turns

Question 3

You are facing a red light with a green arrow pointing left. What may you do?

• Nothing, the red light cancels the arrow
• Go straight ahead as well
• Turn left only after a full stop of five seconds
• Turn left with care, giving way to pedestriansCorrect answer

A green arrow permits only the movement it points to. Everything else is still stopped by the red.

Rule cited: The Driver's Handbook (South Australia), topic: traffic lights

Question 4

What does a yellow diamond sign tell you?

• There is a hazard or a change in the road aheadCorrect answer
• A legal restriction begins
• You are entering a tourist route
• Parking is available ahead

Yellow diamond signs warn of things like curves, crests, crossings or merging traffic. Any speed shown with them is advisory.

Rule cited: The Driver's Handbook (South Australia), topic: road signs

Question 5

What does a single continuous line beside a broken line down the centre of the road mean for you?

• You may always cross it to overtake
• If the continuous line is nearest to you, you must not cross it to overtakeCorrect answer
• It marks the edge of the sealed road
• It marks a bicycle lane

The line nearest your side of the road governs your movement. A broken line on your side means you may cross when it is safe.

Rule cited: The Driver's Handbook (South Australia), topic: road markings

Question 6

You are approaching a railway level crossing with a STOP sign and no lights or boom gates. What must you do?

• Slow down and cross without stopping if you cannot hear a train
• Cross at speed to spend less time on the tracks
• Stop, look and listen in both directions, and cross only when it is clearCorrect answer
• Stop only if a train is visible

Passive crossings rely entirely on you. Make sure there is room on the far side before you start across.

Rule cited: The Driver's Handbook (South Australia), topic: level crossings

Question 7

You reach an intersection where the traffic lights are completely blank because of a power failure. What should you do?

• Slow down, approach with care and give way as you would at an intersection with no signalsCorrect answer
• Treat every direction as having a green light
• Stop and wait until the lights come back on
• Follow the vehicle in front through without stopping

With nothing working, the lights give nobody priority. Slow right down and sort out the order with the other drivers carefully.

Rule cited: The Driver's Handbook (South Australia), topic: traffic lights

Question 8

A yellow warning sign for a curve has a number shown underneath it. What does that number mean?

• A new speed limit that replaces the posted limit
• The minimum speed for the curve
• The distance in metres to the curve
• The highest speed at which the curve can comfortably be taken in good conditionsCorrect answer

Advisory speeds on yellow signs are not the legal limit, but ignoring them on a wet or loaded curve is how cars run wide.

Rule cited: The Driver's Handbook (South Australia), topic: road signs

Question 9

You are in the right turn lane facing a red arrow pointing right, while the lights beside it are green. What may you do?

• Turn right with care after giving way to oncoming traffic
• Wait behind the stop line until the arrow turns greenCorrect answer
• Turn right only if no vehicle is coming
• Go straight ahead from the right turn lane

A red arrow stops that movement completely, even when traffic beside you has a green light.

Rule cited: The Driver's Handbook (South Australia), topic: traffic lights