Large vehicles — Washington Permit Test
Large vehicles on the Washington permit test — 6 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A loaded truck with properly adjusted brakes traveling at 55 mph needs 450 feet to come to a complete stop.
Cutting in front of one takes away the distance it was already going to need.
It takes a loaded truck with properly adjusted brakes, traveling at 55 mph, 450 feet to come to a complete stop.
When entering traffic ahead of a large vehicle, wait until both of its headlights show in your rearview mirror before merging in front of it.
Both headlights in the mirror is the only way to measure a gap that big from inside your own car.
wait until you can clearly see both of their headlights in your rearview mirror before merging in front of them
Large vehicles may need more than one lane to complete a turn, and they need 2 lanes of space in a roundabout.
A trailer cuts the corner the cab has already gone round, so the space it needs is behind where you are looking.
They also need 2 lanes of space in a roundabout.
Passing a large vehicle while its driver is turning is a frequent cause of collisions, so a driver waits until the turn is complete.
The gap that opens beside a turning truck is the gap the trailer is about to swing through.
Don’t pass a large vehicle when the driver is turning. This is a frequent cause of collisions involving large vehicles.
A driver must yield to any transit vehicle traveling in the same direction that has signaled and is pulling back onto the roadway.
A bus pulling out is carrying forty people who all have somewhere to be, and it cannot accelerate into a gap the way you can.
Yield to any transit vehicle traveling in the same direction as you that has signaled and is pulling back onto the roadway.
Snowplows can throw snow up and off the road, causing blizzard-like conditions for anyone following too closely.
You lose the whole road for a second, and you lose it at the moment the plow is slowing down.
Snowplows can force snow up and off the road, causing blizzard-like conditions. This can reduce visibility for drivers following too closely.
On the test
How far does a loaded truck at 55 mph need to stop completely?
450 feet to come to a complete stop. Cutting in front of one takes away the distance it was already going to need. Washington State Driver Guide, p.98: “It takes a loaded truck with properly adjusted brakes, traveling at 55 mph, 450 feet to come to a complete 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 Washington State Driver Guide, published by the Washington State Department of Licensing, and against the state code itself. Last checked 2026-09-14.
- src/assets/drivers-manuals/WA.pdf (Washington State Driver Guide, Washington State Department of Licensing, retrieved 2026-09-14)
- https://dol.wa.gov/driver-licenses-and-permits/driver-training-and-testing/driver-guides
- https://dol.wa.gov/driver-licenses-and-permits/driver-training-and-testing/do-i-need-take-test