The minimum age for driving is 16 in most states but some states will not allow unrestricted driving until 18. Some car rental agencies refuse to rent a car to any person under 25 years of age. Other agencies will rent to young drivers but require an added surcharge. Some rental agencies in the US will not rent to drivers over 71 years of age. State Route Road Sign Seat belts are required Nearly all states have laws requiring the driver and front passengers to wear seat belts.
Many states require children to wear seat belts even in the back seats.
Nearly every state requires special child restraint seats for all young children. Most states require motorcyclists to wear helmets. Old US Route Road Sign Radar Detectors illegal in some states Some states permit you to use radar detectors, while other states prohibit them. Many people seem to ignore this prohibition. Some states require you to use daytime running lights during rain.