roadwise.Open study app

Missouri driving lesson · Safe Driving Basics

Seat belts, air bags and child restraints

A 3-minute lesson from the Missouri course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Safe Driving Basics
Checkpoint questions
6
Source pages
57, 58

Seat belts greatly reduce your chance of being hurt or killed in a crash. Air bags help, but only with a belt: they don't protect you in side, rear or rollover crashes, and a deploying air bag can seriously injure or kill someone who isn't properly restrained.

Know the rule

Wear the lap belt low and snug across the hips and the shoulder belt across the chest. Never put the shoulder belt under your arm or behind your back. With a two-part system, wear both.

Handbook p. 57 ↗

Know the rule

Wear seat belts even if your vehicle has air bags. An air bag won't keep you behind the wheel if you're hit from the side or rear or the vehicle rolls over.

Handbook p. 57 ↗
10 inches

Minimum space NHTSA recommends between the center of your breastbone and the center of the steering wheel

Handbook p. 57 ↗

Know the rule

Children 12 and under should always ride properly restrained in a rear seat. Never put a rear-facing infant seat in the front seat of a vehicle with a front passenger air bag.

Handbook p. 57 ↗

Know the rule

Missouri law requires the operator and front-seat occupants of all passenger vehicles to wear a properly adjusted and fastened seat belt. ALL passengers riding with an intermediate license holder must be properly restrained.

Handbook p. 57 ↗

Know the rule

The child restraint law applies in any motor vehicle except a public carrier for hire or a school bus.

Handbook p. 57 ↗

Missouri child restraint law

Missouri child restraint law
ChildRequired restraint
Under 4 years old, any weightChild passenger restraint system
Under 40 pounds, any ageChild passenger restraint system
Age 4–7, 40–79 lbs, and under 4'9"Child restraint system or booster seat
Age 8+, or 80+ lbs, or over 4'9"Vehicle safety belt or booster seat
Handbook p. 57 ↗

Put it into practice

Your nephew is 6, weighs 50 pounds and is 4'1". He's 4 to 7, 40 to 79 pounds and under 4'9", so he must ride in a child restraint system or booster seat, and in the back seat since he's under 12.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

Children less than 4 years old, regardless of weight, must be secured how?
  1. A seat belt, if over 40 pounds
  2. In a child restraint system
  3. A booster seat only
  4. A booster seat, if over 30 pounds

Answer: In a child restraint system

Children less than four years old, regardless of weight, must be secured in an appropriate child passenger restraint system.

Handbook p. 57 ↗
A child is 6 years old, weighs 60 pounds, and is 4'2" tall. What restraint is required?
  1. A regular seat belt only
  2. A seat belt, in the rear seat only
  3. A child restraint system or booster seat
  4. A rear-facing infant seat

Answer: A child restraint system or booster seat

Children at least 4 but under 8, weighing 40-80 lbs and under 4'9", must be secured in a restraint system or booster seat.

Handbook p. 58 ↗
At what weight must children, regardless of age, be secured in a child passenger restraint system?
  1. Under 20 pounds
  2. Under 60 pounds
  3. Under 80 pounds
  4. Under 40 pounds

Answer: Under 40 pounds

Children weighing less than 40 pounds, regardless of age, must be secured in a child passenger restraint system appropriate for that child.

Handbook p. 57 ↗
Should you place a rear-facing infant restraint in the front seat of a vehicle with a front passenger air bag?
  1. Yes, if the infant is over 20 pounds
  2. Only if the air bag is manually disabled first
  3. Never in front with a passenger air bag
  4. Only if no adult can sit in back

Answer: Never in front with a passenger air bag

Never put a rear-facing infant restraint in the front seat of a vehicle with a front passenger air bag.

Handbook p. 57 ↗
Under Missouri law, which vehicle occupants are always required to wear a seat belt?
  1. The driver only
  2. All occupants in every seat
  3. Only passengers under 18
  4. The operator and all front seat occupants

Answer: The operator and all front seat occupants

Missouri law requires the operator and front seat occupants of passenger vehicles to wear a properly adjusted and fastened seat belt.

Handbook p. 57 ↗
If you hold an Intermediate License, what is different about seat belt requirements for your passengers?
  1. ALL passengers, not just those in front
  2. No difference from the standard rule
  3. Only passengers under 12 must be restrained
  4. Only passengers under 16 must be restrained

Answer: ALL passengers, not just those in front

All passengers accompanying an intermediate license holder must be properly restrained, not just those in the front seat.

Handbook p. 57 ↗
Take the lesson checkpoint in the app

More in Safe Driving Basics