Much the same situation exists in the United States. There, more than 20 states have passed laws allowing any two-wheeled vehicle that has pedals for supplying part of the motive power and an auxiliary engine with a total piston displacement of no more than 50 cubic centimeters (cc) for supplying the other part of the power to be operated on almost the same basis as bicycles. The minimum age for moped operators is several years below that for automobile drivers, and in some states the moped may be operated on public roads without a license or insurance coverage. Often, maximum speed for a moped is specified by law at about 30 miles (48 km) per hour.
The motor scooter, which resembles a plain scooter, has two small wheels and a low-powered gasoline engine geared to the rear wheel. It is produced in greatest number in Italy, where it serves as low-cost transportation for persons who otherwise would have to use bicycles or walk. Motor scooters are regulated much like motorcycles in most countries. For that and other reasons, they continue to decline in popularity.