Bicycle Laws in Arizona

The state gives you the same protections and duties as any person riding on a roadway or shoulder the moment you mount up, under A.R.S. 28-812, but a bicycle falls outside the state’s own definition of a motor car, and that gap decides more than most bicyclists expect. Sidewalk provisions, helmet requirements, and crosswalk regulations come from your city, not from state statute, which is why the honest answer to “is this legal” depends on which side of a municipal line you were riding on.

If an adjuster has told you that you were in the wrong position, the provision they are quoting is on this page, and so is what it does to your claim.

What Counts as a Bicycle, and Why the Distinction Matters

A bicycle is not a vehicle under state statute, and that single distinction decides your DUI exposure, whether you need a horn, and where the traffic code reaches you at all. A.R.S. 28-101 defines a bicycle as a human-powered device with two wheels over 16 inches in diameter, or three wheels with at least one over 16 inches. Racing wheelchairs count, while a child’s cycle on 12-inch wheels does not.

Search results and AI summaries routinely say the opposite, and the error matters because three separate provisions turn on it:

• DUI. A.R.S. 28-1381 applies to a “vehicle,” and A.R.S. 28-101 excludes a bicycle from that definition, so the statute cannot reach you.
• Horns. Cars must carry an audible warning device. You are not required to have a bell or a horn.
• Location. Your duties attach on public roads and shoulders, not everywhere, which is why the state has nothing to say about how you ride on a sidewalk.

None of this weakens your position, because A.R.S. 28-812 still grants you the standing of any person on the roadway where it applies.

Your Protections and Duties on the Roadway

A.R.S. 28-812 grants every bicyclist on a roadway or shoulder the same rights and responsibilities as motorists. A motorist cannot crowd you out of your position, honk you onto the shoulder, or treat your lane as theirs to take, and if one does it and you are hurt, that conduct is the evidence your claim runs on.

Subsection B is the provision almost nobody tells you about. No state agency may consider a cycling violation when deciding whether to suspend your license, and no insurer may count it as a moving violation when setting your rates. Cyclists regularly assume a citation on the bike has damaged their driving record, and under this statute it has not. The violation can still shift a percentage of fault onto you, but that is a different question.

Where Do You Have to Ride in the Lane?

You must ride as close as practicable to the right-hand curb or road edge, and “practicable” is not “possible.” A.R.S. 28-815(A) writes four exceptions into the statute itself, and taking the full lane under any of them is compliance rather than a violation:

1. Passing another bicycle or a car going the same direction.
2. Setting up a left turn at an intersection, a private road, or a driveway.
3. A bicyclist needs to avoid conditions including fixed or moving objects parked or moving vehicles, bicycles, pedestrians, animals and surface hazards.
4. A lane too narrow for a bicycle and an automobile to travel safely side by side within it.

That last exception carries the most weight in a claim, because most travel lanes are too narrow to share with larger vehicles at a safe distance under typical riding conditions. An adjuster’s opening argument is almost always that you should have been further right, with no account of the parked vehicles, potholes, and other hazards that pushed you left.

Subsection B limits how many may ride abreast: persons riding bicycles on a roadway shall not ride more than two abreast. Under subsections C and D, a designated bicycle path or bicycle path usage area is set aside for the exclusive use of bicycle riders. No person may park or operate a car in a bicycle path except to cross to a driveway or in an emergency. Roadways set aside for the exclusive use of bicyclists carry identical protections. These lanes protect you rather than confine you, and nothing in the statute forces a bicyclist into one when a bicycle path is available.

Signals and Stop Signs

The state has no rolling-stop rule for cyclists, so a bicyclist must stop at every red light, stop sign, and traffic control device exactly as motorists do. (A.R.S. 28-644). Some states let bicyclists treat a stop sign as a yield, but this state does not. Our stop sign guide covers what that means at a four-way.

You also owe three duties that cyclists forget more often than they run lights:

1. Signal before you move. A.R.S. 28-756 calls for a signaling gesture on every turning movement and stop. Left arm straight out means a left, the same one bent up at the elbow or the right one extended means a right, and left arm pointed down means a stop.
2. Yield to people on foot. A pedestrian holds the right of way at crosswalks under A.R.S. 28-792, and on the sidewalk your city’s ordinance sets the provision.
3. Travel with traffic, never against it. A person pulling out of a side street looks left for oncoming traffic, so riding against the flow puts you outside that search pattern.

Equipment the Law Requires

After dark, A.R.S. 28-817 requires:

• A white front headlight visible from 500 feet in front
• A red rear reflector visible from 50 to 300 feet behind
• A rear light is allowed, but only the reflector is required

The same statute requires a brake that can skid the wheel on dry pavement, and 28-813 and 28-816 add a fixed seat and at least one hand on the bars at all times.

Sirens and whistles are prohibited, and no bell is required.

Do You Have to Wear Helmets?

No. The state has no statewide helmet requirement at any age. Tucson, Sierra Vista, Yuma, Pima County, Flagstaff, and Oro Valley require helmets for children under 18, but riding bare-headed as an adult violates no statute. Our helmet guide covers how a missing helmet gets argued in a claim.

Can You Ride on Sidewalks or Through a Crosswalk?

The state has no statute on sidewalk riding, so the answer is whatever your city says, and cities disagree. A.R.S. 28-627 gives the appropriate local authority the power to regulate cycling, and the state stepped back because A.R.S. 28-601 defines roadway and shoulder in a way that excludes the sidewalk entirely.

Riding a bicycle through a crosswalk is lawful in this state, and this is the point where almost no page gets right. In Maxwell v. Gossett (1980), the state Supreme Court declined to read those statutes as prohibiting crosswalk riding, treating it as an ordinary negligence question. A 1998 analysis by the Tucson City Attorney’s office reached the same conclusion.

Officers nonetheless cite bicyclists under A.R.S. 28-815(A) for crosswalk riding with some regularity. That subsection governs where you ride on a roadway and does not reach a crosswalk at all, so a ticket written under it is worth challenging rather than paying.

Permission is not protection, and the Phoenix numbers show why. In the city’s 2007 Cycling Collision Summary, 308 of 440 cyclist-and-car collisions, or 70 percent, involved a bicyclist on the sidewalk. The mechanism has not changed, because someone pulling out of a private road or turning across a walk is not looking for someone moving at cycling pace.

What Your City Adds on Top

State statute is only the floor, because A.R.S. 28-627 gives each local authority except where preempted by state traffic laws, power to write its own rules on top of it. Local authorities in Phoenix regulate cycling in Chapter 36 of the city code, Tucson in section 5-2 of the Tucson Code, and Tempe adds its own sidewalk and crosswalk provisions. The same ride can be legal in one place and prohibited two miles later.

Maricopa and Pima counties accounted for 1,131 of the state’s 1,379 cycling accidents in 2024, or 82 percent, per Table 7-15 of ADOT’s 2024 Motor Vehicle Crash Facts. Check with local authorities for the roads you ride before assuming the statewide answer applies.

What the State Bans Outright

Four flat prohibitions, none of which depends on how carefully you were riding or the circumstances of the trip:

1. Holding onto a moving car (A.R.S. 28-814).
2. Carrying a package that keeps you from gripping the handlebars (A.R.S. 28-816).
3. Riding anywhere but the saddle (A.R.S. 28-813(A)).
4. Carrying more people than the frame is designed for, so a tandem is lawful and a crossbar passenger is not (A.R.S. 28-813(B)).

When children break one of these, A.R.S. 28-811 holds the parent or guardian responsible.

Can You Get a DUI on a Bicycle?

No, not on a pedal bicycle. A.R.S. 28-1381 criminalizes impaired operation, but 28-101 excludes a human-powered device from the definitions that statute covers, so it never reaches you.

The same exclusion covers electric bicycles even though a device past the class limits is a different question. Our DUI on a bike guide covers where that line falls.

E-Bike Classes

This state sorts electric bicycles into three classes under A.R.S. 28-819, all capped at 750 watts. Class 1 is pedal-assist to 20 mph, Class 2 adds a throttle at the same ceiling, and Class 3 is pedal-assist to 28 mph.

Class 1 and Class 2 may use bike paths and multi-use paths. Class 3 is generally kept off bike paths unless the shared path bicycles use runs beside a roadway. Our e-bike guide covers the city restrictions, which move faster than the statute.

The Three-Foot Passing Provision

Any driver overtaking you must leave at least three feet of distance under A.R.S. 28-735, which the state enacted in 2000. Subsection B of that statute sets a civil penalty, up to $500 when the pass causes serious physical injury and up to $1,000 when it causes a death.

Few riders learn about Subsection C until a crash forces the question. Those penalties do not apply when a bicyclist is injured in vehicular traffic lanes while designated cycling lanes or paths are present and passable. The obligation in subsection A still stands, and so does your claim, but the statutory fine drops away in exactly the situation where you were lawfully taking the lane.

The civil penalty for killing a bicyclist with a bad pass is smaller than a number of common speeding fines, and it has nothing to do with what your injury claim is worth. What the statute gives you is not its fine but the duty it creates, and a breach of that duty is what your claim is built on.

What Motorists Owe You

Both you and the person behind the wheel carry duties on the roadway, and drivers who hurt you have usually broken a specific one. Arizona law obliges motorists to give you at least three feet when passing under A.R.S. 28-735, to yield to you at intersections and driveways as they would to other cars, and to keep out of designated cycling lanes except when crossing them. Opening a car door into the path of a bicyclist is its own violation under A.R.S. 28-905, and a dooring claim usually rests on that provision.

The state also tests cyclist safety on the license examination under A.R.S. 28-3164, so drivers cannot claim they were never taught that a cyclist belongs on the road.

Does It Matter If Nobody Gets a Ticket?

No. A statutory violation is evidence of negligence in your civil claim whether or not an officer wrote a citation, and the two decisions are made by different people for different reasons.

This matters more under Arizona law than bicyclists realize, because the three-foot provision is enforced almost exclusively after a serious crash. Bicyclists watch motorists pass within inches daily and reasonably conclude the statute is decorative. It is not, only unenforced in court, and it stays fully live in your civil claim.

• A citation is a decision under the traffic laws, criminal or civil. An officer who did not see the pass, or who arrived after the fact, often cannot write one.
• Liability is a separate finding. Your claim asks whether the person breached a duty and hurt you, and the statute supplies the duty regardless of what the officer did.
• Evidence fills the gap. Skid marks, damage geometry, your position in the lane, a dashcam, or a witness can establish a too-close pass that no ticket records.
• The reverse is also true. A citation against you is an argument for a fault percentage, not a verdict, and the four written exceptions in A.R.S. 28-815(A) are what answer it.

If you were told you have no case because nobody was cited, that conclusion did not come from the statutes that govern this state.

What Happens to Your Claim If You Broke a Provision?

Arizona is a pure comparative negligence state under A.R.S. 12-2505, which means a share of fault reduces what you recover instead of eliminating it. A bicyclist found 30 percent at fault keeps 70 percent of their damages, and a bicyclist found 90 percent at fault still keeps 10 percent. Texas and Pennsylvania would bar both of those bicyclists at 51 percent, so this is one of the more protective standards in the country. It is also why an adjuster will spend real effort arguing your riding position, your lights, or your signal.

The deadlines are less forgiving than the fault standard:

• Two years to file suit. A.R.S. 12-542 sets the personal injury limit, running from the date of the crash.
• A child’s claim is tolled. Under A.R.S. 12-502 the clock does not start until the child reaches 18, and then runs two years.
• 180 days to notice, then one year to sue. If a city, a county, or the Arizona Department of Transportation had a part in your crash, through a surface defect, a signal failure, a maintenance problem, or a government car, A.R.S. 12-821.01 requires a formal notice of claim within 180 days, and A.R.S. 12-821 then gives you one year to sue rather than two. Miss either and the two-year statute does not save you.

That 180-day notice is the deadline that ends otherwise strong cases in this state. If your crash involved pavement, a signal, or a lane design rather than only another person on the road, treat 180 days as your real deadline and work backward from it.

Arizona Bicycle Crash Numbers

The state recorded 1,379 cycling accidents in 2024, killing 44 cyclists and injuring 1,349, according to Table 7-11 of ADOT’s 2024 Motor Vehicle Crash Facts. Just over 96 percent of them, 1,325 crashes, happened in urban parts of the state, as did 37 of the 44 deaths. Our bicycle accident statistics page breaks the trend down further.

One Bill to Watch: SB 1008

Senate Bill 1008 would set a 15 mph speed limit for pedal and electric cycles and scooters on a clear shared-use path and 5 mph while passing someone on it. As of August 2026 it has not passed, so nothing in it is in effect yet. Check the state legislature’s site before you rely on any posted limit on a path.

If You Were Hit

Drivers who broke one of these bicycle laws owe you for your medical bills, your lost income, your damaged bicycle, and what your injuries have cost you beyond the receipts. The pure comparative fault provision means a mistake of your own reduces that recovery rather than ending it.

If you were hit while riding in this state, we can tell you which statute was broken and what it is worth. Call 888-521-6377 for a free consultation. There is no fee unless we recover for you.

Ready to Get Started?

If you’re a cyclist who has been in an accident, call today for a free initial consult about your legal claim. We’re here to help with your legal questions. Contact our law firm for coast-to-coast bike accident and personal injury representation.

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Posted by Robert Goldwater

Robert Goldwater is a cyclist representing cyclists. He has practiced personal injury and wrongful death law for more than 20 years, graduating with Honors from Arizona State University Law School, and has helped recover over $1 billion for clients, including injured cyclists.

All articles by Robert Goldwater