Lane splitting is legal in only one state: California, where motorcyclists can ride between rows of stopped or moving vehicles at any speed the surrounding traffic allows. Five other states — Arizona, Colorado, Minnesota, Montana, and Utah — permit a slower, more restricted version known as lane filtering. In every other state, riding between lanes is either banned by name or ticketed under general traffic rules.
So the honest answer to “is lane splitting legal” depends entirely on where you’re riding and how fast the traffic around you is moving. The details below matter, because in a filtering state, breaking any one condition turns a legal maneuver into a citation.
California Is the Only Full Lane-Splitting State
California law defines lane splitting as riding a two-wheeled motorcycle between rows of stopped or moving vehicles in the same lane, on any road including divided and undivided highways.1California Legislative Information. Vehicle Code Section 21658.1 The statute sets no speed cap. It instead directs the California Highway Patrol to publish safety guidelines, which recommend keeping your speed no more than 10 mph faster than surrounding traffic and avoiding splitting near large vehicles like buses and big rigs.2California Highway Patrol. California Motorcyclist Safety
The practical gap between California and every other legal state is wide. A California rider in freeway traffic moving at 30 mph can lawfully move between lanes at 40 mph. No other state allows anything close to that.
The Five States That Allow Lane Filtering
Filtering is a low-speed maneuver meant mostly to let a motorcyclist move to the front of a red light or past a traffic jam. Each state has its own rules on speed, road type, and the condition of surrounding traffic.
Arizona. On streets with a speed limit of 45 mph or less and at least two lanes going the same direction, a rider on a two-wheeled motorcycle can pass stopped vehicles at up to 15 mph. Surrounding traffic must be fully stopped.3Arizona Legislature. Arizona Revised Statutes Title 28 – 28-903 Operation of Motorcycle on Laned Roadway; Exceptions
Colorado. Filtering is allowed only when traffic is at a complete stop. The motorcycle must pass on the left at 15 mph or below, cannot cross into oncoming traffic, and cannot use the shoulder. The lane must be wide enough for the motorcycle and the stopped vehicle to fit side by side. Once vehicles start moving, the rider must merge back into the flow.4Colorado Department of Transportation. Motorcycle Lane Filtering
Minnesota. Effective July 1, 2025, Minnesota’s law is the broadest filtering rule outside California. A motorcyclist can pass vehicles in the same lane as long as the motorcycle stays at or below 25 mph and does not exceed the surrounding traffic by more than 15 mph. That lets filtering work both when traffic is stopped and when it is creeping forward. The law excludes roundabouts, school zones, work zones with only one open lane, and freeway on-ramps where vehicles are queued.5Minnesota Office of the Revisor of Statutes. Minnesota Statutes 169.974
Montana. A two-wheeled motorcycle can overtake vehicles that are stopped or moving at 10 mph or less. The motorcycle’s speed cannot exceed 20 mph, and the lanes must be wide enough to pass safely.6Montana State Legislature. Montana Code Annotated 61-8-392 Lane Filtering for Motorcycles
Utah. Filtering is permitted on roads posted at 45 mph or less with at least two lanes in the same direction. Traffic being passed must be completely stopped, and the motorcycle cannot exceed 15 mph. When traffic starts moving, the rider must merge back into a lane.7Ride to Live Utah. Lane Filtering
A few patterns run through these laws. Every filtering state except Minnesota requires surrounding traffic to be fully stopped. Arizona and Utah cap the road’s speed limit at 45 mph, which effectively keeps filtering off freeways. And every one of these states limits the practice to two-wheeled motorcycles, so riders on trikes or motorcycles with sidecars should assume they don’t qualify.
Where Lane Splitting Is Illegal
In the remaining states, riding between lanes is illegal. Some prohibit it by name. Florida’s traffic code states flatly that no one may operate a motorcycle between lanes of traffic or between adjacent rows of vehicles.8Florida Legislature. Florida Statutes Section 316.209 New York prohibits a motorcyclist from overtaking and passing another vehicle within the same lane. Other states reach the same result through general rules requiring vehicles to stay within a single marked lane or barring improper passing.
A handful of states don’t mention lane splitting in their traffic code at all. Riders sometimes read that silence as permission. It isn’t. Officers in these states routinely ticket riders under catch-all provisions like improper lane use, unsafe lane change, or failure to maintain a single lane. The outcome turns on whether the officer thinks the maneuver created a risk, and an officer watching a motorcycle thread between cars will almost always say it did. There is no safe harbor in a gray-area state the way there is in a state with an explicit filtering statute.
What a Ticket or Crash Will Cost You
Penalties for an illegal lane-splitting stop usually mean a traffic citation with a fine, typically in the $100 to $500 range depending on the jurisdiction, plus points on your license. The bigger risk is a reckless driving charge, which brings steeper fines and can lead to license suspension. That escalation is more likely at higher speeds or in heavy traffic.
The financial fallout from a crash depends heavily on whether splitting was legal where it happened. In California or a filtering state where the rider followed all the rules, the maneuver alone doesn’t equal fault. In every other state, it becomes a strong argument for the other driver’s insurance company.
Most states use some form of comparative negligence, which divides fault between both parties. A motorcyclist who was lane splitting illegally can still recover damages, but the payout shrinks by whatever share of fault lands on the rider. A rider found 40 percent responsible collects only 60 percent of their damages. In states with a modified version of this rule, crossing the 50 or 51 percent fault threshold bars recovery entirely. Insurance adjusters know the math, and a claim from an illegal split invites them to argue the maneuver was the primary cause of the collision even when the other driver was inattentive or made an unsafe lane change. Riders in legal states should document that they were within the statutory conditions, because adjusters will look for any deviation.
Shoulder Riding Is Not Lane Splitting
Riders sometimes confuse lane splitting with using the paved shoulder to bypass traffic. These are legally distinct. Shoulders are reserved for emergencies and breakdowns, and riding on them is illegal in virtually every state regardless of what the lane-splitting laws allow. CHP’s guidelines for California explicitly say that riding on the shoulder is not lane splitting and is not legal.2California Highway Patrol. California Motorcyclist Safety Colorado and Utah’s filtering laws also prohibit shoulder use.4Colorado Department of Transportation. Motorcycle Lane Filtering No state currently permits routine shoulder riding for motorcycles.
Where the Law Is Moving
The trend is toward more states allowing some form of filtering, and the pace has picked up. California legalized lane splitting decades ago. Utah followed in 2019, Montana in 2021, Arizona in 2022, Colorado in 2024, and Minnesota in 2025. Every new law has been a filtering law with strict speed caps rather than California-style open lane splitting. Legislators appear more comfortable letting riders pass stopped traffic at low speeds than permitting freeway splitting.
Missouri introduced a filtering bill in its 2026 legislative session that would allow motorcycles to pass stopped or slow-moving vehicles at up to 10 mph over the traffic speed and no more than 25 mph. The same bill would make it illegal for car drivers to intentionally block a filtering motorcycle.9BillTrack50. MO SB1369 Enacts Provisions Relating to Motorcycle Operation Whether that bill passes or not, the direction of the law is consistent: narrow, low-speed filtering is spreading, and California remains alone at the top end.