New Hampshire leaves adult seat-belt use to personal choice
The distinction in New Hampshire’s rule is age: drivers and passengers under 18 must wear seat belts, while adults are not required to buckle up. For adults, the law leaves the decision—and the risk—to the individual. That makes seat-belt use a question of personal responsibility as well as road safety.
A belt changes what happens in a sudden stop
In a collision, a vehicle can stop far faster than the people inside it. Without a belt, a person keeps moving until something else stops them: the dashboard, the windshield, another passenger, or the road after being thrown from the vehicle. A seat belt restrains the body and spreads the stopping force across stronger areas, especially the hips and chest. It can also help keep someone inside the vehicle.
Airbags do not make belts unnecessary. They are designed to work with a restrained occupant; a person moving forward unbelted can reach an airbag at the wrong moment or strike the car’s interior first.
Freedom of choice has consequences beyond the driver
Leaving adults unrequired to buckle up reflects a different policy choice from requiring them to do so: the state does not mandate this particular protection for adults, even though a crash can injure passengers and affect others who respond to or bear the costs of its aftermath. The practical implication is stark: in New Hampshire, an adult can legally ride without a belt, but the vehicle’s motion does not make that choice any less consequential.
