Are You Always At Fault If You Hit Someone from Behind?

Last Updated on July 15, 2023

One of the most frequently-repeated facts about car insurance is that you’re never at-fault if someone hits you from behind.

Is this true? Is the other driver immediately at-fault if you get hit from behind? Or are there certain situations where the driver in front is responsible? Today, we’re explaining everything you need to know about whether or not you’re at-fault automatically if you hit someone from behind.

Key Takeaways:

  • The rear driver is almost always at-fault when hitting someone from behind because it’s their responsibility to leave a safe distance between them and the front car.
  • The front driver may be at-fault in some situations, such as having no or malfunctioning brake lights, stopping suddenly to make a turn and failing to execute it, reversing suddenly, pulling into traffic unsafely, or pulling over without turning on the hazard lights.
  • The Assured Clear Distance Ahead (ACDA) rule states that drivers should always be able to stop within the distance they can see to be clear of hazards, and drivers who violate this rule may pose an immediate hazard and be liable for a rear-end collision.
  • Rear-end collisions are very common and dangerous, especially involving commercial vehicles, and they kill 1,700 people every year in the United States.

You’re Almost Always At-Fault If You Hit Someone from Behind

In the vast majority of cases, the rear driver is at-fault when that driver hits someone from behind.

The reason is that it’s your responsibility to leave a safe distance between you and the car in front of you. Even if the driver in front of you slams on his or her brakes and comes to a complete stop for no reason whatsoever, you should have given yourself enough room to stop at whatever speed you were traveling.

There are certain situations where the front driver will be found to be at least partially at-fault during a rear-end collision. However, the rear driver is almost always at least partially negligent during a rear-end collision.

What If Someone Pushes Your Car?

Plenty of rear-end collisions are chain reactions. The driver behind you gets hit, bumps into you, and then you bump into the car in front of you.

Are you still at-fault in a chain-reaction incident like this?

Typically, yes, you are still at least partially-responsible in a situation like this. The reason is simple: in the eyes of the auto insurance industry, you were following too close to the far in front of you. If you had given yourself adequate space, then you wouldn’t have bumped into the car in front of you even after being pushed.

Is the Front Driver Ever At-Fault?

There are certain situations where the front driver – the driver that gets hit from behind – will be found to be at-fault – even if they’re just partially at-fault.

Here are some of the situations where the front driver might be at-fault:

  • The front driver has no brake lights or malfunctioning brake lights
  • The front driver stopped suddenly to make a turn and failed to execute the turn
  • The front driver reversed suddenly
  • The front driver pulled into traffic from a side street while failing to leave enough room for rear cars to react
  • The front driver pulled over to the side of the road – like to fix a flat tire or a mechanical issue – but failed to turn on the hazard lights

In these situations, the front driver may be at least partially at-fault. Let’s say you were sitting at a red light and the driver in front of you suddenly reversed because a car swerved too closely while cutting across the intersection. Your car hits the front vehicle despite the fact that you didn’t move.

Unfortunately, many of these situations are hard to prove without witnesses or a dashboard camera.

Remember the “Assured Clear Distance Ahead” Rule

There’s something called the Assured Clear Distance Ahead (ACDA) rule. This rule varies from state-to-state, but it plays a crucial role in many rear-end collision disputes.

Here’s how ACDA is defined in most states:

“[ACDA is] the distance which can be seen to be clear of hazards by the driver, within which they should be able to bring the device to a halt (to stop the car); drivers generally may not pose an “immediate hazard” upon where or when they cannot assure such distance ahead is clear.”

Other states get more specific. Here’s how Oklahoma defines it:

“Any person driving a vehicle on a highway shall drive the same at a careful and prudent speed not greater than nor less than is reasonable and proper, having due regard to the traffic, surface and width of the highway and any other conditions then existing, and no person shall drive any vehicle upon a highway at a speed greater than will permit the driver to bring it to a stop within the assured clear distance ahead.”

No matter how you define ACDA, it adds up to one simple fact: as a driver, you’re responsible for leaving a safe distance between you and the vehicle in front of you. You should always leave enough room to stop – even if the other driver slams on his or her brakes and comes to a complete stop for no apparent reason in the middle of a 70mph freeway.


The National Transportation Safety Board, or NTSB, claims 1 in 3 car crashes in the United States are rear-end collisions. Rear-end collisions kill 1,700 people every year. These crashes involve a disproportionately high number of commercial vehicles. Approximately 40% of fatal rear-end collisions involve commercial vehicles despite the fact that commercial vehicles only account for 3% of highway traffic.

In most cases, the rear driver is at-fault for the rear-end collision because, no matter the circumstance, you should leave a safe distance between you and the car in front of you. There are some cases, however, as we mentioned above, where the front driver will be found at-fault.

James Shaffer
James Shaffer James Shaffer is a writer for and a well-seasoned auto insurance industry veteran. He has a deep knowledge of insurance rules and regulations and is passionate about helping drivers save money on auto insurance. He is responsible for researching and writing about anything auto insurance-related. He holds a bachelor's degree from Bentley University and his work has been quoted by NBC News, CNN, and The Washington Post.
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