Arizona Bicycle Laws

Required under age

No statewide age requirement

Applies to passengers

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Standard

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Penalty

No statewide bicycle helmet law. Some municipalities require helmets for minors - check local ordinances.

Statute

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Confirm equipment fit with the helmet size calculator before relying on an age rule alone.

Statewide rule

Defers to local rules

Notes

Arizona Revised Statutes Title 28, Chapter 3, Article 11 (Bicycles) is silent on sidewalk riding; A.R.S. § 28-627 reserves the authority to regulate bicycles on sidewalks to local jurisdictions. Phoenix City Code § 36-76.02 prohibits riding a bicycle on a sidewalk in any business district; Tucson Code § 20-146 prohibits sidewalk riding by anyone aged 10 or older in the central downtown area; Tempe and Scottsdale each maintain similar downtown carve-outs.

Statute

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A bell does not replace yielding or signaling, but it can warn other path users; compare bike bells and horns.

Applies to bicycles

No

Separate cycling DUI statute

No

BAC limit

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Penalty

Arizona's DUI statute (A.R.S. § 28-1381) applies to operators of a 'vehicle,' but A.R.S. § 28-101 excludes 'devices moved exclusively by human power' from the definition of vehicle, which keeps bicycles outside the statute. Public-intoxication or related offenses may still apply.

Statute

¹²

If alcohol or drugs may impair the rider, do not ride; arrange another way home and secure the parked bike with a lock suited to the theft risk.

— Not yet researched.

Front light required

Yes

Front spec

Lamp on the front emitting a white light visible from at least 500 feet to the front.

Rear requirement

Rear reflector only

Rear spec

Red rear reflector of an ADOT-approved type, visible from 50 to 300 feet when directly in front of upper-beam headlamps. A red rear lamp visible from 500 feet may be used in addition to the reflector.

Side reflectors

No

Pedal reflectors

No

When required

Darkness

Statute

¹

For equipment that matches the visibility requirement, compare bike lights by beam and runtime.

— Not yet researched.

Two abreast allowed

Yes

Conditions

May not ride more than two abreast except on paths or parts of roadways set aside for the exclusive use of bicycles. UVC §11-1205 derivative.

Statute

¹

For low-light road and group visibility, compare bike lights for commuting and unlit roads.

Rule

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Statute

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A mirror can supplement direct observation but cannot replace shoulder checks or hearing traffic; compare bike mirrors by mount type.

— Not yet researched.

Bicycle registration required

No

Operator license required

No

For theft prevention when the bike is parked, compare bike locks for different risk levels.

Interstates

Allowed

Notes

ADOT permits bicycle travel on the paved shoulders of rural Interstate segments where no reasonable alternative exists, including long stretches of I-10, I-8, I-17, I-19, and I-40. Bicycles are prohibited on Interstate segments within the Phoenix and Tucson metropolitan areas (signed at on-ramps) and through tunnels.

For low-light road and group visibility, compare bike lights for commuting and unlit roads.