Laws governing the operation of bicycles, motor scooters (electric or gas powered), skateboards, and other modes of transportation on public streets, highways, and roads vary from state to state, and among cities and towns (municipal ordinances).

Some of the important laws governing these alternative modes of transportation include proper roadways and lanes for operation; speed limits; required safety precautions (helmets, etc.); application of traffic laws; license requirements; and the application of laws regarding being under the influence of alcohol or drugs.

In Maine, bicycles are legally considered vehicles, and cyclists have the same rights and responsibilities as motorists. They are required to obey all traffic signals and signs, ride with the flow of traffic, and signal turns. Helmets are not mandated by state law for bicycle riders, but some local ordinances may require them, especially for children. Motor scooters, which include electric and gas-powered scooters, are subject to registration and insurance requirements, and operators must have a valid driver's license. Helmets are required for operators under 18 years of age. Skateboards are typically regulated by local ordinances rather than state law, and rules can vary widely regarding where they can be used and whether safety gear is required. For all these modes of transportation, operating under the influence of alcohol or drugs is illegal and subject to the same DUI laws that apply to motor vehicle drivers. Speed limits for these alternative modes of transportation are generally the same as for motor vehicles, unless otherwise specified by local ordinances.