3.2 Seat Belts, Child Restraints & Air Bags
Key Takeaways
Massachusetts requires every person in a passenger vehicle, including vans and small trucks under 18,000 lb, to wear a safety belt or ride in a child restraint.
An unbelted driver, or an unbelted passenger 16 or older, can be fined $25, and the driver is fined $25 for each unbelted passenger aged 12 through 15.
Children must ride in a federally approved child restraint until they are at least 8 years old or at least 57 inches tall.
Never place a rear-facing child seat in a front seat that has an air bag; the back seat, especially the middle, is safest for children.
A safety belt fine can be issued only when the vehicle is stopped for another traffic violation.
Motor vehicle crashes are the leading cause of death for children and young adults in America, and about one in three Americans will be injured or killed in a crash. Safety belts are the most effective protection: worn correctly, they cut the chance of death or serious injury by about 50 percent. In 2023, nearly 11,000 unbelted people were killed in U.S. crashes.
The Safety Belt Law
Massachusetts law requires every person in a passenger motor vehicle, including vans and small trucks under 18,000 lb, to wear a safety belt or sit in a child passenger restraint.
| Who is unbelted | Who is fined | Fine |
|---|---|---|
| The driver | Driver | $25 |
| A passenger 16 or older | That passenger | $25 |
| A passenger aged 12, 13, 14 or 15 | The driver, per passenger | $25 each |
| A child who must be in a child restraint, or a child who has outgrown one but is unbelted | Driver | $25 |
Enforcement: you can be fined under the belt law only when stopped for another traffic violation.
Who Does Not Have to Wear a Belt
- Drivers and passengers of vehicles made before July 1966
- Drivers of taxis, liveries, tractors, buses, and trucks with gross weights of 18,000 lb or more (some commercial drivers still must buckle up)
- Passengers of emergency vehicles, and drivers of police and fire vehicles
- U.S. Postal Service employees driving while working
- A person who physically cannot wear a belt because of a disability certified by a physician
Child Passenger Restraints
Infants and small children must ride in a federally approved child passenger restraint until they are at least eight years old or at least 57 inches tall, whichever comes first. After that they must wear a properly used safety belt.
- The seat must carry a label showing it meets Federal Motor Vehicle Safety Standard No. 213 (49 C.F.R. 571.213).
- It must be permanently attached to the vehicle or attached by a safety belt or an attachment system.
- Infant seats face the back of the vehicle.
- Never put a rear-facing child seat in a front passenger seat that has an air bag.
- The safest place for a child is the back seat, and the back middle seat is best.
Choosing a Seat
| Seat type | Manual's guide |
|---|---|
| Infant seat | Up to 20 lb |
| Toddler convertible seat | 20 to 40 lb |
| Booster seat | 40 to 80 lb |
Always check the manufacturer's exact height and weight limits. Certified Child Passenger Safety Technicians can help install a seat.
How Safety Belts Protect You
- They stop you from hitting the windshield, dashboard, steering wheel or other people. In a head-on crash the car stops but your body keeps moving. Hitting a windshield at 30 mph is like falling from a third-story window onto pavement.
- They keep you inside the vehicle. Lap and shoulder belts make your chance of surviving a crash about five times better than being thrown out.
- They keep you behind the wheel. Staying seated lets you keep control and avoid a worse crash.
Fit: the lap belt sits low, tight and flat across the hips, never twisted. The shoulder belt crosses the shoulder and chest, never under the arm or across the face or neck.
Myths the Manual Debunks
| Myth | Fact |
|---|---|
| "I'll be trapped if the car burns or sinks." | Fires and submersions are rare. A belt keeps you conscious, and it takes less than a second to unbuckle. |
| "My car has air bags." | Air bags work with belts, not instead of them. Front air bags protect only in head-on crashes, not side or rear crashes. |
| "It's a short trip." | Most crashes happen less than 25 miles from home, and eight out of ten happen at 40 mph or less. |
| "Car seats are too much trouble for a quick errand." | Most children killed in crashes would have lived if properly restrained. |
Unbelted adults can also crush children and pets in a crash.
Belt-Law Scenarios
- A 15-year-old in the back seat is unbelted during a stop for speeding: the driver gets a $25 fine for that passenger, on top of the speeding citation.
- An adult passenger refuses to buckle up: the passenger, who is 16 or older, receives their own $25 fine.
- A 7-year-old who is 58 inches tall: the child has reached the 57-inch threshold, so a properly worn safety belt is allowed.
- A 1965 classic car without belts: vehicles made before July 1966 are exempt.
Air Bag Safety
- Children in back. An infant in a rear-facing seat must never ride in front of a passenger air bag.
- Right seat for age and size. Use the child restraint rules above.
- Belts plus bags. Always wear lap and shoulder belts.
- Move the front seats back as far from the dashboard as you can while still driving comfortably.
Under Massachusetts law, until when must a child ride in a federally approved child passenger restraint?
Until at least 10 years old and 60 inches tall
Until at least 8 years old or at least 57 inches tall
Until at least 6 years old or at least 48 inches tall
Until at least 12 years old, regardless of height
A driver is stopped for a broken taillight. A 14-year-old passenger and a 17-year-old passenger are both unbelted. Who is fined?
The driver for the 14-year-old; the 17-year-old pays their own
Each passenger pays their own $25 fine
The driver pays $25 for each passenger
No one, since belt fines need a primary stop for belts
Where should an infant in a rear-facing child seat ride in a car with a passenger-side air bag?
In the front seat with the seat moved fully back
In the front seat if the air bag light is on
In the back seat, ideally the middle
Anywhere, as long as the seat faces forward
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