Kentucky Right Lane Laws: Fines, Points, and CDL Rules

Kentucky’s left lane law requires drivers on limited-access highways posted at 65 mph or higher to stay out of the leftmost lane unless they are passing, yielding to merging traffic, or avoiding an unsafe condition in the other lanes.¹ A separate, broader rule governs any road with three or more lanes in your direction, and trucks face tighter restrictions still. A conviction carries a $20 to $100 fine, 3 points on your license, and court costs that typically exceed the fine itself.

When the Keep-Right Rule Applies

The rule most drivers think of as “keep right except to pass” is KRS 189.340(8). It applies only where three things line up: the road is a limited-access highway, it has four or more lanes, and the posted speed limit is at least 65 mph.¹

That 65 mph threshold is the detail most people miss. On a four-lane highway posted at 55 mph, this subsection does not apply. On I-64, I-65, or I-75 where the limit is 65 or 70, it does. If you are cruising in the left lane at the speed limit and a faster driver comes up behind you, you are expected to move right and let them pass. Whether that other driver is speeding is their problem, not your justification for holding the lane.

When You Can Legally Use the Left Lane

The statute lists specific reasons the left lane is available to you:

Passing a slower vehicle, then returning right once you can do so safely.
Yielding to traffic entering the highway from an on-ramp.
Road or traffic conditions that make the right or center lanes unsafe, such as heavy congestion, debris, flooding, or a disabled vehicle on the shoulder.
Preparing for a left-side exit or turn.
Following posted signs that assign lanes differently from the default.

The exceptions cover real driving situations, not personal preference. Once the reason you moved left no longer applies, the law expects you back in the right or center lane.¹

Rules on Any Road With Three or More Lanes

A broader subsection, KRS 189.340(7), applies whenever a road has three or more marked lanes going in your direction, regardless of speed limit. You must drive entirely within a single lane and cannot change lanes until it is safe to do so.¹

The center lane is also restricted. You should only be there when passing another vehicle with clear visibility ahead, preparing for a left turn, or when signs designate the center lane for your direction. Official signs directing slower traffic into a specific lane must be followed.¹ So if you are on a road posted below 65 mph, subsection (8) may not reach you, but subsection (7) still shapes how you use the lanes.

Stricter Rules for Trucks and Trailers

Truck tractors, trailers, and semitrailers face a tighter ban. On any road with three or more lanes in one direction, these vehicles are prohibited from the leftmost lane, with only three exceptions: entering or leaving the highway, yielding to traffic merging on, or when conditions make the right and center lanes unsafe.¹

Passing is not on that list. A tractor-trailer cannot use the leftmost lane just to overtake a slower vehicle on a three-plus-lane road. The truck has to use the center lane for that.

What a Ticket Actually Costs

A violation of KRS 189.340 falls under the general penalty in KRS 189.990, which sets a fine of $20 to $100 per offense.² The fine itself is modest, but Kentucky adds mandatory court costs to every traffic case. Base court costs alone typically run around $140 or more, so even a minimum $20 fine easily produces a total bill over $150.

Points and Insurance Impact

Kentucky assigns 3 points for improper lane usage and separately lists 3 points for failure to yield the left lane. Accumulate 12 or more points within two years (7 if you are under 18) and your license can be suspended.³ Three points from a single lane ticket will not suspend most drivers on its own, but it stacks with anything else on your record. A lane ticket now and a speeding ticket a few months later can put you close to the line.

Points also feed into insurance. Insurers review your driving history at renewal, and a moving violation on your record can raise premiums for several years depending on the carrier.

Keeping It Off Your Record With Traffic School

Kentucky’s State Traffic School program can prevent points from being assessed. You cannot enroll on your own — the district court has to refer you, and the referral becomes a court order.⁴ The course is offered online or in a classroom with a $30 fee paid to the court on top of other costs.

Completing traffic school keeps the conviction off the 3-year public driving record that most insurers check. It still appears on the 5-year record used by law enforcement and courts.⁴ Not every judge grants it for every ticket, and a recent history of traffic school referrals can be grounds for denial. Ask early, ideally at your first court appearance.

What Changes if You Have a CDL

Commercial drivers face separate consequences. Under federal and Kentucky rules, an improper or erratic lane change counts as a “serious violation” for CDL holders. Two serious violations within three years trigger a 60-day CDL disqualification. Three within three years extend that to 120 days.⁵

CDL holders also have a notification duty: you must tell your employer within 30 days of any traffic conviction other than parking, whether you were in a personal vehicle or a commercial one when it happened.⁵ Traffic school can prevent point assessment for CDL holders but does not erase the conviction itself, which is what the disqualification rules look at.

Kentucky’s Move Over Law Is Different

Drivers sometimes confuse the keep-right rule with Kentucky’s move over law, KRS 189.930. When you approach a stopped emergency, public safety, or disabled vehicle showing warning signals on a highway with at least four lanes, you must move to a lane not adjacent to that vehicle if you can do so safely. If you cannot change lanes, you must slow to a safe speed.⁶

This applies even when the stopped vehicle is on the shoulder and you are legally in the right lane. Failure to yield to an emergency vehicle carries 4 points, more than a standard lane violation.³

Fighting a Left-Lane Ticket

The most direct defense is showing your situation fit a statutory exception. Passing, yielding to merging traffic, or reacting to a hazard in the right lane all put you inside the rule. Dashcam footage, weather records, or a tow truck visible on the shoulder can back that up.

The 65 mph threshold matters too. If you were cited under subsection (8) on a road posted below 65 mph, the subsection does not apply, though a subsection (7) charge could still stand if the road had three or more lanes in your direction. Knowing which subsection your ticket cites tells you whether the facts actually support it.

A traffic attorney familiar with Kentucky courts can sometimes get charges reduced or dismissed on procedural grounds or weak evidence. Traffic matters often run a few hundred dollars in fees, which can be worth it if the points would push you toward suspension, threaten a CDL, or noticeably raise your insurance.

1
Kentucky Legislative Research Commission. Kentucky Revised Statutes 189.340 – Overtaking Vehicles, Bicycles, or Electric Low-Speed Scooters
2
Justia Law. Kentucky Revised Statutes 189.990 – Penalties
3
Kentucky Transportation Cabinet. Kentucky Point System
4
Kentucky Transportation Cabinet. Kentucky State Traffic School
5
Kentucky Transportation Cabinet. Commercial Driver’s License
6
Kentucky Legislative Research Commission. Kentucky Revised Statutes 189.930 – Right-of-Way to Emergency Vehicles