A broadside collision is a crash in which the front or rear of one vehicle strikes the side of another, forming a rough T at the point of impact. It’s also called a T-bone or side-impact crash, and it’s one of the deadliest common collision types on the road. Side impacts accounted for 22% of all passenger vehicle occupant deaths in 2023,1Insurance Institute for Highway Safety. Fatality Facts 2023: Passenger Vehicle Occupants and most happen at intersections, which produce about a quarter of U.S. traffic fatalities and roughly half of all traffic injuries every year.2Federal Highway Administration. About Intersection Safety
Why the Side of a Car Is the Worst Place to Be Hit
Head-on and rear-end crashes give you an engine bay or a trunk to soak up energy before it reaches the cabin. A broadside hit gives you a door. Sometimes less than a foot of steel, glass, and trim sits between the striking vehicle and the person inside, and that missing crumple zone is what makes side impacts so disproportionately lethal.
The B-pillar, the vertical post between the front and rear doors, carries most of the structural load. When it fails, the door frame buckles inward, glass shatters, and the door itself can press directly into the torso, pelvis, or head. Federal side-impact standards require doors to resist a specified crush force,3eCFR. 49 CFR 571.214 – Standard No. 214; Side Impact Protection but a high-speed hit from a truck or SUV can overwhelm those thresholds.
Side-impact and side curtain airbags help. They deploy in milliseconds because there’s so little space to work with, and curtain bags dropping from the roof rail protect the head from window frames and intruding objects.4National Highway Traffic Safety Administration. Vehicle Air Bags and Injury Prevention Reinforced door beams and ultra-high-strength B-pillars add margin. None of it eliminates the fundamental problem: seatbelts are built to restrain forward and backward motion, not sideways.
How Broadside Crashes Happen
The setup is almost always the same. One vehicle enters an intersection when it shouldn’t, and another vehicle that had the right of way arrives at the same point a second later.
Running a red light or rolling through a stop sign is the single most common cause. Misjudging the gap during an unprotected left turn is a close second. Speeding makes both worse by shortening reaction time and multiplying the force delivered at impact. A driver looking at a phone may never see the light change or the cross-traffic coming. In heavy traffic, drivers who feel rushed at four-way stops sometimes push into gaps that aren’t really there. Right-of-way rules exist for those moments: the first vehicle to stop goes first, and when two arrive at once, the vehicle on the right has priority.5National Highway Traffic Safety Administration. Right of Way Rules
Not every broadside crash traces cleanly back to one driver. Overgrown hedges, parked trucks, malfunctioning signals, missing stop signs, and badly designed intersections all contribute. When something in the environment caused or worsened a crash, the municipality or property owner responsible for that hazard may share liability alongside the drivers.
Injuries to Expect
Broadside injuries tend to be more severe than those from front or rear impacts because the body is being thrown in a direction the belt system was never designed to control. Research on near-side collisions, where the injured occupant sits on the impact side, shows a consistent pattern.6National Center for Biotechnology Information. Injuries in Near-Side Collisions
- Chest and abdominal injuries make up nearly half of serious harm: broken ribs, lung contusions, and damage to the spleen or liver. Aortic tears are less common but often fatal.
- Head and facial injuries account for about a quarter, including traumatic brain injuries from contact with the intruding door, the other vehicle, or debris.
- Pelvic fractures and hip injuries appear in roughly 14% of serious-injury cases, driven by force transmitted through the door panel.
- Neck and spine injuries, including whiplash and spinal cord damage, are less frequent in the serious-injury data but real, because lateral motion loads the spine in ways it isn’t built to handle.
Occupants on the far side of the vehicle usually fare better, but they can still strike interior surfaces or other passengers as the car is shoved sideways.
Who’s at Fault
Fault in a broadside crash usually reduces to one question: who had the right of way, and who took it anyway? A driver who runs a red and hits a car lawfully crossing the intersection bears clear responsibility. Same for a driver who pulls out from a stop sign into oncoming traffic.
When a driver breaks a traffic law that was written to prevent this exact kind of crash, many courts treat the violation as strong evidence of negligence on its own. This doctrine, called negligence per se, means the injured party doesn’t have to independently prove carelessness. The violation does most of that work.
Shared blame complicates things. Most states use some form of comparative negligence, where each driver’s financial responsibility tracks their percentage of fault. If you’re found 20% at fault for speeding through a green light, your compensation drops by 20%. A few states still follow contributory negligence, which bars recovery entirely if you’re even 1% at fault. Several modified-comparative states cut off recovery once your share reaches 50% or 51%. The same facts can produce full compensation in one state and nothing next door, so the rule where you live matters.
Evidence That Proves What Happened
Strong claims layer several kinds of evidence together.
- Event data recorders, the black boxes built into most modern vehicles, capture pre-crash speed, braking, throttle, crash forces, and restraint status. EDRs aren’t federally required, but the vast majority of new vehicles have them, and their data is hard to argue with because it comes straight from the vehicle’s own sensors.7National Highway Traffic Safety Administration. Event Data Recorder
- Traffic camera and dashcam footage showing a driver entering an intersection against a red light is close to conclusive. Video from nearby vehicles can also capture signal status and driver behavior in the seconds before impact.
- Skid marks, debris scatter, and crush depth on the struck vehicle let reconstruction experts estimate speed and trajectory with reasonable precision.
- Police reports document road conditions, signal status, and on-scene statements. Independent witness accounts matter most when electronic evidence isn’t available.
If you’re able to move around after the crash, photograph the scene, both vehicles, the traffic signals, and any skid marks before they fade. Exchange insurance, license, and contact information with the other driver. Get names and numbers from witnesses. Months later, when memories have blurred and the intersection has been swept clean, that basic documentation can decide the claim.
Deadlines You Can’t Miss
Every state sets a statute of limitations for filing a personal injury lawsuit after a crash. Miss it and you lose the right to sue no matter how strong your case is. Roughly 28 states set the deadline at two years from the accident date, about 12 states allow three years, and the rest fall somewhere between one and six. Property damage deadlines are sometimes longer than injury deadlines in the same state.
Separate from any lawsuit, most states also require an accident report filed with the DMV or police when injuries or property damage cross a set threshold. These reporting windows are far shorter, often 10 days or less, and missing one can jam up your insurance claim or trigger a license suspension. Look up your state’s specific reporting rules soon after any broadside crash involving injuries or meaningful vehicle damage.