Air bags — Missouri Permit Test
Air bags on the Missouri permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Seat belts should be worn even in a vehicle with air bags, because air bags do not protect you in a side or rear impact or a rollover.
An air bag is aimed forward. It does nothing about the three other ways a car is hit.
they do not protect you if you are hit from the side or rear, or if the vehicle rolls over
The National Highway Traffic Safety Administration recommends drivers sit with at least ten inches between the center of their breastbone and the center of the steering wheel.
The bag comes out faster than you can see. Ten inches is the room it needs to inflate rather than strike you.
The National Highway Traffic Safety Administration recommends drivers sit with at least ten inches between the center of their breastbone and the center of the steering wheel.
An unrestrained or improperly restrained occupant can be seriously injured or killed by a deploying air bag.
The bag is designed to catch a belted body in the right place. An unbelted one arrives somewhere else entirely.
An unrestrained or improperly restrained occupant can be seriously injured or killed by a deploying air bag.
Never put a rear-facing infant restraint in the front seat of a vehicle with a front passenger air bag.
The bag deploys straight into the back of the seat, which is where the baby's head is.
Never put a rear-facing infant restraint in the front seat of a vehicle with a front passenger air bag.
Children 12 and under should always ride properly restrained in a rear seat.
The rear seat is furthest from the impact and from the air bag. For a child it is simply the safer place.
Children 12 and under should always ride properly restrained in a rear seat.
On the test
Why should you wear a belt in a car fitted with air bags?
Air bags do not protect you in side, rear, or rollover crashes. An air bag is aimed forward. It does nothing about the three other ways a car is hit. Missouri Driver Guide, p.55: “they do not protect you if you are hit from the side or rear, or if the vehicle rolls over”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
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Where these come from
Every rule here is checked against Missouri Driver Guide, published by the Missouri Department of Revenue, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/MO.pdf (Missouri Driver Guide, Revised August 2026, retrieved 2026-09-14)
- src/assets/drivers-manuals/MO.pages.txt (plain pdftotext over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 2, folioMarker, nonLawPages and the extraction flag, each with its measured basis)