Traffic Light & Signal Rules in Australia

The three lights: what each one legally requires

Every full traffic light in Australia carries the same three colours, and each one is a legal instruction, not a suggestion.

• Red means stop. You must stop behind the stop line (or before the traffic light if there is no line) and stay stopped until the light turns green — or until a green arrow allows your particular movement. You cannot creep across the line while waiting.
• Amber (yellow) means stop — not speed up. Under the Australian Road Rules you must stop if it is safe to do so. The only time you may continue is when you are already so close to the line that stopping would mean braking harshly or stopping over the line. Amber is a warning that red is coming, so if in doubt and you can pull up safely, stop.
• Green means you may proceed if the way is clear. Green is permission, not a command to go regardless. You must not enter the intersection if you would be stuck blocking it, and you must still give way to pedestrians and to any vehicle already legally in the intersection.

That last point is the single most misunderstood idea about traffic lights, and we return to it below.

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Arrows: signals that control one direction only

Arrow signals apply only to the movement the arrow points to. A driver turning right may face a red arrow while drivers going straight ahead have a green light — the two signals are independent.

• Green arrow — you may move in the direction of the arrow, and you have a protected run: oncoming and crossing traffic is being held. You must still give way to any pedestrian crossing the road you are turning into.
• Amber arrow — the protected turn is ending. Stop if you safely can; otherwise complete the movement. It is telling you the green arrow is about to become red.
• Red arrow — you must not make that movement, even if the round light beside it is green. A red right-turn arrow means no right turn, full stop, until it clears.

Where a green arrow is absent and you face a normal green round light to turn, the turn is unprotected — you may turn but you must give way to oncoming traffic and to pedestrians. Learn to read whether your turn is protected (arrow) or unprotected (round light), because the give-way duty is completely different.

Flashing signals and special traffic lights

Not every signal is a steady red-amber-green. You will meet several special cases on Australian roads:

• Flashing amber — treat the intersection as uncontrolled and proceed with caution, giving way according to the normal give-way and signage rules. A flashing amber often appears at quiet times of night or when a signal is on a reduced program; it does not give you priority.
• Flashing yellow at pedestrian crossings and school zones — warns that you may need to stop for people crossing; slow down and be ready.
• All lights off / blacked-out signals — if a set of lights is completely dark (a power failure or fault), treat the intersection as an uncontrolled or give-way intersection: slow right down, prepare to stop, and give way to the right and to any vehicle already in the intersection. Do not assume you have priority.
• B and T signals — a white 'B' controls buses and a white 'T' controls trams or transit vehicles, letting them move before general traffic. If it is not your signal, obey your own round light.
• Twin red lights at rail crossings, bridges and fire stations — flashing twin reds mean stop and stay stopped until they cease, regardless of what you can or cannot see coming.

Red-light cameras: how they actually work

Red-light cameras (many are combined red-light-and-speed cameras) are used across every Australian state and territory. It helps to understand what they detect so the rule sticks.

A camera is triggered when a vehicle crosses the stop line after the light has already turned red — not on amber. The system typically takes two images: one as the vehicle enters against the red, and a second showing it has continued through. That is why entering on a late amber is legal but entering after red is not: the camera is timing the red phase, and so is the law.

Being caught by a red-light camera generally carries both a fine and demerit points, and the exact amounts differ by state and change over time. We do not publish a dollar figure or point count here because those vary by jurisdiction — check the current penalty with your state authority (for example Service NSW, VicRoads, or Queensland's Department of Transport and Main Roads). The safe habit is simple: when the light goes amber and you can stop, stop.

The signal is not the give-way rule

This is the distinction the test loves and new drivers miss. A traffic light tells you whether it is your turn. It does not, by itself, clear the intersection for you.

On a green light you may still have to give way — to pedestrians crossing with you, to oncoming traffic when you are turning right on a round green, and to any vehicle already lawfully inside the intersection when the lights changed. A green light never means ‘go regardless’; it means ‘you are permitted to enter, once it is safe’.

The reverse is also true: the give-way rules at signs and unmarked intersections are a separate topic. When the lights are working, you obey the lights first; the underlying give-way logic only takes over when signals are off, flashing amber, or absent. To keep the two clear in your head, study the signal here and the intersection duties on our road rules hub, and read the road signs guide so you can tell a signal instruction from a sign instruction at a glance.

Common learner mistakes at traffic lights

• Accelerating on amber. Amber means stop if you safely can. Speeding up to ‘beat’ it is both a red-light-camera risk and a fail-worthy error on test.
• Creeping over the stop line on red. You must stay behind the line. Rolling forward to wait is a stop-line offence.
• Turning right on a round green without giving way. A round green is an unprotected turn — oncoming traffic and pedestrians come first. Only a green arrow protects the turn.
• Entering a green light into a blocked intersection. If you cannot clear the far side, you must wait behind the line even on green, so you do not block cross traffic.
• Assuming priority when the lights are dark. A blacked-out signal is not a green light — treat it as give way.

The best way to lock these in is repetition on real question wording. Our free practice tests include signal and intersection questions written in the same style as the official test, and every one of our driving-test practice questions is free to use as often as you like.

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Last verified 7 September 2026 against the Australian Road Rules and the relevant state road authority. Rules, fees and figures change — always confirm current details before you rely on them.