California’s left lane law, found in Vehicle Code 21654, requires any driver moving slower than the surrounding traffic to stay in the right-hand lane or as close to the right edge of the road as practical. Camping in a left lane while faster cars stack up behind you is a traffic infraction that runs about $362 after all assessments and adds one point to your driving record.
What the Keep-Right Rule Actually Says
The rule compares your speed to the cars around you, not to the number on the speed limit sign. If traffic is flowing at 70 mph on a 65 mph freeway and you’re doing 63, you’re the slower vehicle, and the law expects you to be in the right lane.1California Legislative Information. California Vehicle Code VEH 21654
This trips up a lot of drivers. Doing the posted limit does not entitle you to any lane you choose. If cars are passing you on the right, you’re in the wrong lane.
In heavy congestion, the rule loses most of its practical force. Nobody is moving slower than surrounding traffic when every lane is crawling at 15 mph, and officers aren’t writing keep-right tickets in bumper-to-bumper conditions.
When You’re Allowed to Be in a Left Lane
Section 21654 writes in two situations where slower traffic can lawfully leave the right lane:
- Passing another vehicle traveling in the same direction, then returning to the right lane afterward.
- Preparing for a left turn at an intersection, private road, or driveway.
Those are the only exceptions in the keep-right statute itself.1California Legislative Information. California Vehicle Code VEH 21654 A separate statute, Vehicle Code 21650, covers obstructions: if the right side of the road is closed for construction or repair, you’re not violating the law by driving to the left of it.2California Legislative Information. California Vehicle Code VEH 21650 The obstruction exception sits in 21650, not in the keep-right rule, but it has the same practical effect.
The Prima Facie Catch
Section 21654(b) adds something that matters if you get pulled over. If you’re moving slower than surrounding traffic and you’re not in the right lane, that fact alone is prima facie evidence of a violation.1California Legislative Information. California Vehicle Code VEH 21654 The burden shifts to you. You’d need to show a valid reason for being in the left lane rather than the officer having to prove you had no excuse. That makes these citations straightforward to enforce in court.
Fines and Points for a Violation
A ticket under Section 21654 is a standard traffic infraction. The base fine is $70, but California stacks state surcharges, county fees, and penalty assessments on top of the base amount. According to the state’s Uniform Bail and Penalty Schedules, the total comes to roughly $362.3California Courts. Uniform Bail and Penalty Schedules 2025 More than five times the base figure, which is why the ticket amount surprises people.
A conviction also adds one point to your driving record under Vehicle Code 12810.4California Legislative Information. California Vehicle Code VEH 12810 One point from a single ticket isn’t catastrophic, but it feeds into the DMV’s Negligent Operator Treatment System, which escalates as points accumulate:5California DMV. Negligent Operator Actions
- Warning letter at 2 points in 12 months, 4 in 24 months, or 6 in 36 months.
- Notice of intent to suspend at 3 points in 12 months, 5 in 24 months, or 7 in 36 months.
- Probation or suspension at 4 points in 12 months, 6 in 24 months, or 8 in 36 months.
Insurance is the quieter cost. A single-point violation often triggers a rate increase at renewal, and in California’s market that increase can outrun the ticket itself over a couple of years. Combined with any other recent citation or at-fault accident, a keep-right violation pushes you toward the DMV thresholds faster than most drivers expect.
Stricter Rules for Trucks and Vehicles Towing
Vehicle Code 22406 caps certain vehicles at 55 mph on any California highway, including trucks with three or more axles, truck tractors pulling another vehicle, passenger vehicles or buses towing another vehicle, school buses carrying students, farm labor vehicles carrying passengers, vehicles carrying explosives, and trailer buses.6California Legislative Information. California Vehicle Code VEH 22406
Because these vehicles already move at reduced speeds, Vehicle Code 21655 requires them to stay in the right-hand lane or in any lane specifically designated for slower traffic by Caltrans or local authorities. Where signs designate a specific lane, they must use that lane. On a divided highway with four or more lanes going the same direction and no designated truck lanes, these vehicles may also use the lane immediately to the left of the right-hand lane.7California Legislative Information. California Vehicle Code VEH 21655 If you tow a trailer or boat behind a passenger vehicle, these restrictions apply to you.
Carpool Lanes Follow a Different Statute
A high-occupancy vehicle lane is not governed by the general keep-right rule. HOV lanes operate under Vehicle Code 21655.5, and you can only use one if you meet the posted occupancy requirement, ride a motorcycle, drive a qualifying clean-air vehicle with a valid decal, or operate certain emergency and transit vehicles.8California Legislative Information. California Vehicle Code VEH 21655.5 Entering an HOV lane without qualifying is a separate violation that carries a substantially higher fine. Because carpool lanes typically sit on the far left of the freeway, qualifying solo drivers can legally occupy the leftmost lane without passing anyone.