In Japan, any vehicle with an internal combustion engine is regarded as a car, motorcycle or motorized bicycle. A motorized bicycle with a gasoline motor under 50 cc has a regulated maximum speed of 30 km/h (18.6 mph). It must be registered and the rider must have insurance. To ride one, you have to be at least 16 years old, have a license and wear a helmet. All riders without a full driving license for cars or motorcycles must pass a written test and go through one-day practical training in a driving school. Any two-wheel cycle with a gasoline motor over 50 cc is regarded as a motorcycle in law. It can be ridden by persons age 18 or over who have a full driving license for motorcycles who have had long-term training and have sat a driving exam in a driving school. A two-wheel cycle with a gasoline motor of under 125 cc is not permitted to go on Japan’s controlled-access highways.