An overview of Maine's bicycle laws, reviewed and cited to primary sources. Use the sections below to jump to a specific rule, or the Sources block at the end for the full citation list.
This guide is for general information only and is not legal advice. Laws change — verify current rules with your state DOT or a licensed attorney before relying on this for any legal matter. Read full disclaimer.
Helmet rules
Required under age
Required under age 16
Applies to passengers
Yes
Standard
ASTM, Snell, or ANSI (a CPSC-certified helmet meets these specifications)
Penalty
29-A M.R.S. § 2323 requires every operator and passenger under 16 to wear a properly fitted helmet that meets ASTM, Snell, or ANSI standards. A first violation results in a warning; subsequent violations carry a fine of up to $25, which a court may waive on proof of helmet purchase.
Maine has no statewide statute permitting or prohibiting sidewalk cycling. The state Bicycle Coalition guidance and Maine DOT both point readers to municipal codes. Portland prohibits sidewalk riding by anyone over 10 years old in the downtown overlay district; Bangor and Lewiston permit sidewalk riding except where signed.
Maine's OUI statute (29-A M.R.S. § 2411) applies only to operators of a 'motor vehicle' on a public way. Bicycles are not motor vehicles under 29-A § 101, so a cyclist cannot be charged with OUI. Public-drinking and disorderly-conduct laws may still apply.
Lamp on the front emitting a white light visible from a distance of at least 200 feet to the front, required from one-half hour after sunset to one-half hour before sunrise.
Rear requirement
Rear reflector or light
Rear spec
Red reflector on the rear visible from at least 200 feet when directly in front of lawful lower-beam headlamps. A red lamp on the rear visible from 200 feet may be used in addition to the reflector.
Two abreast permitted on the roadway except when impeding the normal and reasonable movement of traffic; riders must move to single file when being overtaken on roadways too narrow to share.
Bicycles are prohibited on Maine Interstate highways (I-95, I-295, I-195, I-395) under MaineDOT controlled-access regulations. The Maine portion of US-1 and other state routes remain open to bicycles.