Stopping distance — Colorado Permit Test
Stopping distance on the Colorado permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Stopping distance is the distance your vehicle travels from the time you realize you must stop until the vehicle actually comes to a stop.
It includes the time you spend reacting, which is most of it at speed. Drivers who think only about the brakes underestimate it badly.
Stopping distance is the distance your vehicle travels from the time you realize you must stop until your vehicle actually comes to a stop.
According to the National Safety Council, a lightweight passenger car traveling 55 mph can stop in about 200 feet.
Two hundred feet is most of a city block. Knowing the figure is what makes a two-second gap feel as short as it really is.
According to the National Safety Council, a lightweight passenger car traveling 55 mph can stop in about 200 feet
Many factors affect stopping distance, including speed, the time it takes to recognize you need to stop, how quickly you react and the time your brakes take to slow the vehicle.
Three of the four are about you rather than the car. That is why a tired driver in a good car still stops later.
Many factors affect your stopping distance including speed, the time it takes you to recognize you need to stop, how quickly you react and the time it takes for your brakes to slow and stop your vehicle
Braking too quickly can make you skid, lose control, or make it difficult for drivers behind you to stop without hitting you.
A sudden stop is a surprise to the driver behind, who is already a second behind your decision. Slowing gradually gives them that second back.
If you brake too quickly, you could skid, lose control of your vehicle, and/or make it difficult for drivers behind you to stop without hitting you
By slowing down or changing lanes you may not have to stop at all, and if you do it can be a more gradual and safer stop.
Looking well ahead turns an emergency stop into a gentle one. The earlier you see it, the less you have to do about it.
By slowing down or changing lanes, you may not have to stop at all, and if you do, it can be a more gradual and safer stop
On the test
What does stopping distance include?
The distance covered while you react and brake. It includes the time you spend reacting, which is most of it at speed. Drivers who think only about the brakes underestimate it badly. Colorado Driver Handbook, p.12: “Stopping distance is the distance your vehicle travels from the time you realize you must stop until your vehicle actually comes to a stop.”
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 Colorado Driver Handbook, published by the Colorado Division of Motor Vehicles, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/CO.pdf (Colorado Driver Handbook, DR 2337 (12/05/24), Colorado Division of Motor Vehicles, retrieved 2026-09-14 from dmv.colorado.gov/publications)
- src/assets/drivers-manuals/CO.pages.txt (plain pdftotext over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 3, folioMarker, the extraction flag and the four trap measurements, each with its measured basis)
- 1 CCR 204-30, Rule 8 (402)(B)(4), the Colorado Department of Revenue rule stating the 80% pass mark for the DR 2252WE Driver's License Written Examination, read 2026-09-16 at law.cornell.edu/regulations/colorado/1-CCR-204-30-8
- docs/plans/colorado-exam-shape.md (what was searched and came up empty, and the 30-question practice quiz that must not become the exam's count)
- docs/work/colorado-corpus/plan.md (why the 40-question count was chosen, and the two figures it refused)