Resource Center
Kentucky motorcycle and bicycle laws in one place: helmet rules, eye protection, lane splitting, the three-foot passing law, bike lights, sidewalks and fault.
Reviewed by Larry Forman, Attorney
Riders on two wheels follow most of the same traffic laws as drivers, plus a set of rules that apply only to them. Kentucky motorcycle and bicycle laws cover who must wear a helmet, where you can ride in the lane, how drivers must pass and what equipment you need. Knowing them matters twice after a crash: they shape what the other driver did wrong, and what an insurer will try to blame on you.
This guide collects the Kentucky motorcycle and bicycle laws riders ask about most. For general rules like right-of-way and following distance, see our Kentucky traffic laws guide.
Kentucky doesn't require every motorcyclist to wear a helmet. Under KRS 189.285, a helmet is required for:
Other adult riders may legally ride without one. Riders on a permit also may not carry passengers.
Every motorcycle operator must use approved eye protection "at all times" while the motorcycle is moving, and the bike must have a rear-view mirror. The operator and any passenger must ride on a permanently attached seat designed for them and use permanently attached footrests (KRS 189.285). A valid motorcycle license is required.
Kentucky has no law that expressly allows lane splitting (riding between lanes of slow or stopped traffic). The general rules still apply: on roads with three or more lanes in one direction, drivers must stay within a single lane and not move from it until it's safe, and every pass must be made safely (KRS 189.340). Riders should expect police and insurers to treat lane splitting as unsafe passing.
A motorcycle is entitled to its full lane. A driver who squeezes into a lane alongside a motorcycle is making the same unsafe pass.
Some traffic signals don't detect motorcycles. Kentucky gives riders a defense to a red-light ticket if they came to a complete stop, waited 120 seconds or two full cycles, the signal appeared to be malfunctioning or failed to detect the bike, and no vehicle or person was close enough to be a hazard (KRS 189.338). The law says this defense doesn't apply to "any other civil or criminal action," so it doesn't protect a rider in an injury case.
Kentucky defines a moped as a motorized bicycle with no more than 2 brake horsepower, an engine of 50 cc or less, an automatic transmission and a top speed of 30 mph (KRS 189.285). Electric low-speed scooters may be ridden by people 16 and older on roads, bike lanes and bike paths, and the state's safety rules for them can't include a helmet requirement (KRS 189.289). See our e-scooter page.
A bicycle "shall be operated in the same manner as a motor vehicle," with a few rider-specific rules (601 KAR 14:020). Cyclists stop at stop signs and red lights, signal turns and ride with traffic.
At night and in low visibility, a bicycle (or the rider) must show a front light visible for 500 feet and a red rear light visible for 500 feet. A red rear reflector visible for 100 feet is required whenever the bike is ridden on a road or shoulder. Brakes must be able to stop the bike within 15 feet at 10 mph (601 KAR 14:020).
Kentucky has no statewide helmet requirement for adult cyclists. Louisville requires helmets for riders under 18 in Metro Parks (LMCO § 74.07).
State rules allow parking a bicycle on a sidewalk if it doesn't block pedestrians. Riding is a local question. In Louisville, riders 11 and older may not ride on Metro sidewalks, and no one may ride on sidewalks downtown (LMCO § 74.02). Other cities have their own ordinances.
Kentucky's statutes don't yet define "electric bicycle." See our e-bike accident page for how e-bikes are treated.
KRS 189.340 sets out how a driver passes a bicycle or electric scooter going the same way:
Right hooks, left turns in front of riders and opened car doors are other common crash causes. See our bicycle and pedestrian page.
Kentucky uses pure comparative fault. A rider who broke a rule can still recover, but damages may be reduced by the rider's share of fault. Common insurer arguments include:
The other driver's violations count too: an unsafe pass, a left turn across a rider's path or a failure to yield.
We investigate two-wheel crashes with the rider's perspective in mind: sight lines, lane position, signal timing and vehicle damage. We answer helmet and lane arguments with evidence and medical proof. 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 visit our motorcycle wreck and bicycle and pedestrian pages.
Not for every adult. Helmets are required for riders and passengers under 21, permit holders and riders licensed less than a year.
No Kentucky law expressly allows it, and general lane and passing rules apply. Expect it to be treated as unsafe passing.
On a road with one lane in your direction, a driver passing a bicycle or e-scooter must leave at least three feet. With more than one lane, the driver should move over a lane if it's safe.
Generally yes, when there is one, except for listed reasons such as turning left, passing, avoiding a hazard or staying out of the door zone.
Not if you're 11 or older, and not by anyone downtown, under Louisville Metro's ordinance.
Yes. Not wearing a helmet doesn't bar a claim. At most, it may reduce damages for injuries the defense proves a helmet would have prevented.
Riders often face blame they don't deserve. See our statute of limitations guide, then get a free case evaluation or call (502) 931-6788. No fee unless we win. Our office is at 1139 S. 4th St., Louisville, KY 40203. More guides are in our Kentucky Injury Resource Center.
This page is general information about Kentucky law as of October 2026, not legal advice.
