Louisville Sideswipe Accident Lawyer

Reviewed by Larry Forman, Attorney

A sideswipe accident usually starts with a lane change that shouldn't have happened. One driver drifts, merges without looking or cuts over at the last second for an exit, and the side of their car scrapes along yours. These crashes are common on Louisville's interstates and wide state roads, and they're often disputed because each driver says the other one moved. Kentucky's lane and signal laws, plus the right evidence, usually settle it.

Common causes of sideswipe crashes

• Unsafe lane changes without checking mirrors or blind spots
• No turn signal, or signaling while already moving over
• Last-second exits and merges at interchanges like Spaghetti Junction
• Drifting out of a lane because of a phone. See distracted driving accidents.
• Two cars moving into the same middle lane at once
• Trucks changing lanes with a car in their blind spot. See our truck wreck lawyer page.
• Passing too close to a motorcycle or a car on a narrow road

A sideswipe at highway speed can push a car into a barrier, across lanes or into other traffic, which is how some multi-vehicle pileups start.

What Kentucky law says about lane changes

Kentucky has three rules that come up in almost every sideswipe case:

• Move over only when it's safe. "A person shall not turn a vehicle or move right or left upon a roadway until the movement can be made with reasonable safety nor without giving an appropriate signal" (KRS 189.380(1)).
• Signal in advance. A signal to turn "shall be given continuously for not less than the last one hundred (100) feet traveled" before the turn (KRS 189.380(2)).
• Stay in your lane on multi-lane roads. Where a road has three or more marked lanes in one direction, a driver must stay "as nearly as may be practical entirely within a single lane" and can't leave it "until the driver ascertains that the movement can be made with safety" (KRS 189.340(7)(a)).

On every road, drivers must also operate "in a careful manner, with regard for the safety and convenience of pedestrians and other vehicles" (KRS 189.290(1)). Our Kentucky traffic laws guide covers the other rules of the road.

Who is at fault in a sideswipe accident?

Usually the driver who left their lane. The hard part is proving which car moved. In a sideswipe accident, the damage is along the sides of both cars, so it doesn't point to a clear "rear-ender" the way a rear-end crash does. Insurers often call it 50/50 when they can't tell.

Kentucky uses pure comparative fault (KRS 411.182). If you're found partly at fault, maybe for speeding or for moving at the same moment, your damages are reduced by your share, but you can still recover. See how pure comparative fault works and our Kentucky negligence law guide.

Evidence that proves who changed lanes

• Damage patterns. Where the scrape starts and the direction it runs can show which car was moving into the other. An accident reconstruction can make this clear.
• Dashcam video, yours or another driver's. See dashcam footage after a crash.
• Traffic cameras. Louisville's interstate cameras don't always record, so ask early. See TRIMARC camera footage.
• Witnesses who saw the other car move over, especially drivers behind you
• Vehicle data from the cars' event data recorders, and in trucks, lane-departure or camera systems
• The other driver's own words at the scene, and the police report

If the other driver kept going after the sideswipe, see our hit-and-run accident lawyer page. Your own coverage may help.

What to do after a sideswipe

1. Call 911 and get a police report, even if the damage looks minor.
2. Photograph both cars from the front and back corners and along each side, and the lane markings.
3. Save dashcam video right away; many cameras record over it.
4. Get witnesses' names and numbers.
5. Get medical care. Side impacts can cause neck, shoulder and back injuries that show up later.
6. Report it to your insurer, but don't agree to a fault split on the first call. For the car itself, see our property damage claim guide.

How Forman & Associates handles sideswipe cases

We move quickly to get the video, the vehicle data and the witnesses before they're gone, and we bring in reconstruction when the insurer calls it a 50/50. We prepare cases for trial from the start. Larry Forman has tried 50+ jury trials and won 95% of them. Learn more about Larry Forman, see our case results (past results don't guarantee a similar outcome), or return to our car crash lawyer page.

Sideswipe accident FAQs

Who is usually at fault when a car changes lanes and hits me?

Usually the driver who changed lanes. Kentucky law says a driver can't move right or left until it can be done with reasonable safety and with a signal.

What if we both changed lanes at the same time?

Fault can be shared. Under Kentucky's pure comparative fault rule, each driver's damages are reduced by their own share, but both can still recover.

Does the other driver have to signal before changing lanes?

Yes. Kentucky requires an appropriate signal before moving right or left, and a turn signal for at least the last 100 feet.

The insurer says it's 50/50. Can I fight that?

Yes. Damage patterns, video, witnesses and vehicle data often show which car moved. A 50/50 call is frequently a starting position, not a finding.

What if the driver who sideswiped me didn't stop?

Call the police and your insurer. Your uninsured motorist coverage may apply, depending on your policy's terms.

How long do I have to file a claim?

Generally two years from the crash or the last PIP payment for Kentucky car crash claims. Don't wait, because video can disappear in days.

Sideswiped on a Louisville road?

Let us find the proof of who moved. Get a free case evaluation or call (502) 931-6788. No fee unless we win.

This page is general information about Kentucky law as of October 2026, not legal advice.