In a traffic-light accident, who is at fault in Australia usually depends on which signal applied to each driver, when they entered the intersection and whether they proceeded safely. A driver who enters against a red light may often be assessed as responsible, but disputes are common when both drivers say they had a green light or when one vehicle was turning.
Signal timing, turning arrows, stop lines, dashcam footage and independent witnesses can be decisive. This article gives general information, not legal advice, and Acorn Rentals does not decide legal liability.
Why a Green Light Does Not Remove the Duty to Proceed Safely
A green light generally permits a driver to proceed, but it does not mean the intersection will always be clear. A driver should not enter a blocked intersection and must still respond to vehicles, pedestrians and hazards already in the roadway. The official NSW traffic-light guidance explains the meaning of red, amber and green signals, arrows and stop lines.
If another vehicle remains in the intersection after its light changes, the fault assessment may examine when each driver entered and whether the driver facing green had a reasonable opportunity to avoid the collision. Acorn’s guide to determining fault after a car accident explains why a rule breach is considered alongside evidence about the full sequence.
Red, Amber and Green Light Disputes
A driver enters on red
If footage or witnesses show a driver crossed the stop line after the signal turned red, that evidence may strongly influence the assessment. The exact timing matters, so preserve any video in its original format.
A driver accelerates through amber
An amber light generally means stop if it is safe to do so. A dispute may focus on the vehicle’s distance from the stop line, speed and whether sudden braking would have been unsafe. Avoid treating amber as an automatic extension of green.
The intersection is blocked
A driver may have entered on green but become stranded when traffic stopped. If the signals change and cross traffic starts, evidence about congestion, vehicle position and visibility may show how the crash occurred.
Turning Arrows and Right-Turn Crashes
A green arrow controls the direction shown by the arrow. When there is no protected right-turn arrow, a driver turning right may need to give way to oncoming traffic before completing the turn. Victoria’s guidance on intersections and giving way is a useful official reference for drivers in Melbourne.
These crashes can create a side impact. Acorn’s article on T-bone accident fault explains how collision angle and vehicle paths may help, while a lane movement before impact may also raise the issues covered in the lane-change accident guide.
What If Both Drivers Say They Had a Green Light?
Conflicting accounts do not mean the claim cannot be assessed. Traffic signals operate in sequences, and evidence may show whether both movements could have received green signals at the same time. Police observations, traffic-camera footage where available, nearby CCTV, dashcam video and independent witnesses may help.
Record the precise lane and direction of travel for each vehicle. A driver may have seen a green signal that applied to another lane or movement, particularly where there are several arrows and signal heads. Do not edit video or rely only on screenshots; keep the original file with its timestamp.
Evidence to Collect After a Traffic-Light Accident
- Signal layout: photograph traffic lights, arrows, lanes and stop lines from a safe location.
- Direction of travel: note each vehicle’s approach, intended movement and impact point.
- Footage: preserve dashcam video and identify nearby cameras promptly.
- Witnesses: collect contact details from people who saw the signal phase.
- Vehicle evidence: photograph damage, debris and final positions before vehicles are moved if safe.
Collect the other driver’s details using Acorn’s guide to information to exchange after an accident. Write down your recollection while it is fresh, including whether the light changed before or after you crossed the stop line.
Can You Get an Accident Replacement Vehicle After the Crash?
If another identified driver caused the traffic-light crash and your vehicle cannot be used, you may be eligible for a replacement vehicle through Acorn. Eligible not-at-fault drivers in supported areas of NSW and Victoria can be assisted while their own vehicle is repaired or assessed, subject to approval and terms.
Have the other driver’s details, scene photos, footage, witness information and repair or towing documents ready. You can apply online or call Acorn on 1300 22 67 67.
Traffic-Light Accident FAQs
Is the driver who ran a red light at fault?
A driver proven to have entered against a red light may often be assessed as responsible. The available evidence and the actions of other road users still need to be considered.
Who is at fault if both drivers had a green light?
Both may have had green signals for different permitted movements. A turning driver may still need to give way, so the applicable arrows, lanes and vehicle paths are important.
Can traffic-light camera footage be obtained?
Availability varies. Note the exact location and time, ask police or your insurer about relevant evidence and contact nearby businesses quickly if CCTV may exist.
What if fault is still disputed?
Continue preserving evidence and follow the claim process. Acorn can review the accident details when considering eligibility, but it does not determine legal liability.