Warning signs — Missouri Permit Test
Warning signs on the Missouri permit test — 9 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Warning signs tell you to slow down and be prepared to stop if necessary, because a special situation or a hazard is ahead.
Every sign in this family says the same thing underneath: something is coming that you cannot see yet.
These signs warn you to slow down and be prepared to stop if necessary because a special situation or a hazard is ahead.
This sign means there is a stop sign ahead on the road you are on, so be prepared to stop.
It gives you the stop before you can see it, which matters most where the view is blocked.
There is a stop sign ahead on the road you are on. Be prepared to stop.
This sign means there is a traffic light signal ahead on the road you are on, so be prepared to stop.
A signal hidden by a curve or a crest gives you no warning of its own. This sign is the warning.
There is a traffic light signal ahead on the road you are on. Be prepared to stop.
At this sign you must yield to pedestrians walking in the crosswalk, and slow down.
The crossing is where people are expected to be. Slowing is what makes yielding possible.
Yield to pedestrians walking in the crosswalk. Slow down.
At this sign, slow down and watch for children crossing the road.
Children cross where they are used to crossing, not where a driver would expect. The sign marks the place.
Slow down. Watch for children crossing the road.
This sign means traffic from another road will be entering your road, and you should be prepared for vehicles to move into your lane.
Somebody is arriving beside you with nowhere else to go. Room is the only thing that helps.
Traffic from another road will be entering the road. Be prepared for vehicles to move into your lane.
This sign means two lanes of traffic will soon become one, and a driver in the right lane must merge left, yielding to traffic in the left lane.
Two lanes into one is a negotiation. The sign says who is joining whom.
If you are in the right lane you must merge left, yielding to traffic driving in the left lane.
This sign means the road will soon become two-way traffic divided by a median or barrier.
The road is about to change character. Knowing which way it is changing is the whole message.
The road will soon become two-way traffic divided by a median or barrier.
This sign means two-way traffic will no longer be divided by a median or barrier.
The protection between you and oncoming traffic is ending. After this there is only paint.
Two-way traffic will no longer be divided by a median or barrier.
On the test
What do warning signs like this one tell a driver to do?
Slow down and be prepared to stop if necessary. Every sign in this family says the same thing underneath: something is coming that you cannot see yet. Missouri Driver Guide, p.46: “These signs warn you to slow down and be prepared to stop if necessary because a special situation or a hazard is ahead.”
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
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
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)