In California, anyone under the age of 18 must wear a helmet when riding a bicycle on a street, bikeway or public bicycle path or trail. This includes children who are sitting in restraining seats or are being towed in a trailer behind the bicycle. The law also requires anyone under 18 to wear a helmet when riding a scooter, skateboard or when using inline skates. Bidwell Park, Chico, and El Cerrito require all people, no matter what age, to wear helmets when riding a bicycle.
在加州 18岁以下所有人骑单车或者滑板需要戴头盔
个别加州城市无论任何年纪都需要戴头盔
戴不戴头盔需要看个别州的法律
