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 Missouri, bicycles are considered vehicles and are subject to many of the same traffic laws as motor vehicles. Cyclists must obey traffic signals and signs, ride with the flow of traffic, and use hand signals to indicate turns and stops. There are no statewide laws mandating helmet use for bicyclists of any age, but some local ordinances may require helmets for younger riders. Motor scooters and electric scooters are also regulated in Missouri. Riders must have a valid driver's license, and scooters must be registered if they have a motor size greater than 50cc. Helmets are required for riders under 26 years old or if the scooter can exceed 30 mph. Skateboards are not typically regulated at the state level, but local ordinances may dictate where they can be used, such as prohibiting them from sidewalks in business districts. All riders, regardless of the mode of transportation, must adhere to speed limits and are subject to DUI laws, meaning operating any of these modes of transportation under the influence of alcohol or drugs is illegal.