Anti lock braking — South Dakota Permit Test
Anti lock braking on the South Dakota permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Anti-lock brakes (ABS) let you stop the vehicle without skidding and keep steering control.
Wheels that lock up stop turning, so the car slides where it was headed and the steering wheel stops working.
The ABS will allow you to stop the vehicle without skidding and keep steering control.
With ABS, press the brake pedal as hard as you can and keep applying pressure; ABS works only while you keep the pressure on.
Pumping or easing off an anti-lock brake turns the system off just when the car needs to stop shortest.
Press on the brake pedal as hard as you can and keep applying pressure.
When ABS is working, the brake pedal may vibrate and you may hear a clicking noise; this is normal.
A driver who thinks the buzzing pedal means broken brakes may let go of it and crash into what is ahead.
You may feel the pedal vibrate, and you may hear a clicking noise. This is normal.
If the vehicle does not have ABS, refer to the vehicle owner's manual for the proper braking procedure.
Brakes without anti-lock can lock and slide when pressed hard, so the right way to stop differs from car to car.
If the vehicle is not equipped with ABS, refer to the vehicle owner’s manual for proper braking procedure.
On the test
What does an anti-lock braking system (ABS) let you do in a hard stop?
Stop without skidding and keep steering control. Wheels that lock up stop turning, so the car slides where it was headed and the steering wheel stops working. South Dakota Driver License Manual, p.57: “The ABS will allow you to stop the vehicle without skidding and keep steering control.”
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 South Dakota Driver License Manual, published by the South Dakota Department of Public Safety, and against the state code itself. Last checked 2026-10-04.
- src/assets/drivers-manuals/SD.pdf (South Dakota Driver License Manual, Revised 11/2024, South Dakota Department of Public Safety, retrieved 2026-09-14 and re-checked 2026-10-04; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SD.pages.txt (pdftotext -layout, the fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SD-exam.html (South Dakota Department of Public Safety, South Dakota Driver License Testing Information, KB0043731, read 2026-10-04; states the 80% rate; sha256 pinned under examSource)
- https://www.sd.gov/dps?id=cs_kb_article_view&sysparm_article=KB0043733 (read 2026-10-04; links the manual)