Who Is at Fault When a Car Runs a Red Light
The driver who enters the intersection against a red light is almost always the one found at fault for the crash.
The driver who ran the light is at fault
Running a red light is a traffic violation, and the driver who commits it is the one found liable for a crash that results. This holds whether you were hit while crossing on your green light or hit while already in the intersection on a stale yellow.
Fault gets decided by evidence, not by who says what happened. A police report, a traffic camera, a witness, or damage patterns on both cars can all show who had the red. Insurers look at the same evidence when they decide whose policy pays.
Whether there's proof of the red light
A citation issued at the scene is the strongest evidence. If the officer who responded wrote the other driver a ticket for running the light, that citation carries real weight with both insurers when they sort out fault.
A red light camera, if the intersection has one, settles the question even without an officer present. Ask the police department whether the intersection is monitored and how to request the footage or citation record.
Without a ticket or camera footage, fault comes down to witness statements and the physical evidence. Where the cars were hit, the direction of the damage, and skid marks can all show who entered the intersection first. This is why it matters to get the names and numbers of anyone who saw the crash before they leave the scene.
If no one saw it and there's no camera, the claim can turn into one driver's word against the other. That's a harder case, and it's worth asking your own insurer how they handle a dispute like that.
What state you're in
Most states assign fault in full to the driver who broke the law, even if the other driver made a small mistake too, like going slightly over the speed limit before the crash. A minority of states reduce or bar your recovery if you share any fault at all, so it matters how your state handles shared blame.
Some states also use no-fault insurance rules, which mean your own policy pays your medical bills regardless of who caused the crash, even though the at-fault driver's insurer is still responsible for vehicle damage. Ask your insurer or your state's insurance department which system applies where you live.
If you were hurt and the case may involve a larger claim, how your state treats partial fault can change what you're able to recover. That's a question for an attorney or your insurer, not something to guess at from general rules.
Questions people ask about this
What should I do right after someone runs a red light and hits me?
Call the police before you do anything else, so there's an official report of the crash. Take photos of both cars, the intersection, and any traffic signal or camera visible nearby. Get the other driver's insurance information and the contact information of any witnesses before they leave.
Will my insurance rate go up if someone else ran the red light and hit me?
If you're found not at fault, the crash generally shouldn't raise your premium the way an at-fault accident would. Insurers vary in how they treat accidents on your record even when you weren't to blame, so ask your own insurer how they classify a not-at-fault claim.
Does it matter if the other driver says the light was yellow, not red?
It matters only if there's no better evidence available, since a disagreement over the color of the light is exactly what a witness, camera, or police report is meant to settle. Without one of those, the claim can come down to each driver's account and whatever the insurers decide is more credible.
Can I still make a claim if there were no witnesses and no camera?
Yes, but it may be harder to establish fault without outside evidence. The responding officer's assessment at the scene, any damage pattern that points to who entered first, and your own insurer's investigation can still support a claim even without a witness or camera.
What if I was also doing something wrong, like speeding, when the other driver ran the light?
Whether that reduces what you can recover depends on your state's rule for shared fault. Some states still let you recover in full if the other driver's violation was the main cause, while others reduce your recovery by your share of the blame. Ask your insurer or an attorney how your state handles it.
See how not-at-fault accidents affect quotes before you decide what to do next.
Get a copy of the police report once it's filed, since that document will carry weight with both insurance companies. If the intersection has a traffic camera, ask the police department how to request that footage while it's still available. Write down what you remember about the crash while it's fresh, including the color of your own light and anything the other driver said at the scene. Call your insurer to start the claim and ask directly how they determine fault in a case like yours. If you were injured or the damage is significant, ask whether your state's fault rules could affect what you're able to recover before you accept any settlement.
