Traffic signals — Washington Permit Test
Traffic signals on the Washington permit test — 11 rules, each with the reason behind it and a question on it while it is fresh.
The rules
At a solid red light a driver stops and waits until the light turns green and the intersection is clear of vehicles and pedestrians.
Green means your turn, not that the intersection is empty, and those are different things.
Stop. Wait until the traffic light turns green and there are no vehicles or pedestrians in the intersection before you move ahead.
After a complete stop at a red light, a driver may turn right if there is no sign forbidding it and there is plenty of room to enter traffic.
The stop comes first, because a rolling right turn is how a driver misses the person crossing.
After coming to a complete stop at a red light, you can turn right if you don’t see a “no turn on red” sign and you have plenty of room to enter traffic.
After a complete stop at a red light, a driver may turn left onto a one-way street if there is no sign forbidding it and there is room to enter traffic.
Onto a one-way street nothing is coming the other way, which is what makes the turn possible at all.
After coming to a complete stop at a red light, you can turn left onto a one-way street if you don’t see a “no turn on red” sign and you have plenty of room to enter traffic.
A flashing red traffic light functions as a stop sign: come to a full stop, then go when it is your turn.
It is a stop sign made of light, and the flashing is the only thing that changes.
A flashing red traffic light functions as a stop sign. Come to a full stop, and then go when it’s your turn.
A flashing yellow light has the same meaning as a yield sign, and the intersection is treated as uncontrolled.
Flashing yellow is not permission; it is the signal stepping back and leaving it to the right-of-way rules.
A flashing yellow light has the same meaning as a yield sign. Treat the intersection as an uncontrolled intersection.
A driver is not allowed to accelerate beyond the posted speed limit to enter or clear an intersection on a yellow light.
Speeding up to beat the light is the choice that turns a yellow into a collision.
You are not allowed to accelerate beyond the posted speed limit to enter or clear an intersection when the light is yellow.
A driver already in the intersection when the yellow light comes on continues through at the posted speed.
Stopping halfway across leaves you in the path of everything that gets a green.
If you’re in the intersection when the yellow light comes on, continue through the intersection at the posted speed.
Turning left at a green light, a driver yields to approaching vehicles, because oncoming traffic has the right-of-way.
Green gives you the intersection and does not take it away from the car coming toward you.
When you’re turning left at a green light, yield to approaching vehicles. Oncoming traffic has the right-of-way.
A yellow arrow means the light is going to turn red soon: prepare to stop and give the right-of-way to oncoming traffic.
The arrow was protecting your turn, and a yellow arrow is that protection being taken away.
A yellow arrow means the light is going to turn red soon. Prepare to stop and give the right-of-way to oncoming traffic.
Freeway ramp meters work like regular traffic signals: stop at the white stop line on red, and continue along the on-ramp on green.
The meter is spacing cars so the merge works, and running it puts you into the gap somebody else was given.
Ramp meters work like regular traffic signals. When the light is red, stop at the white stop line.
A green arrow gives the right-of-way to travel in the direction it points, with no oncoming vehicles, crossing traffic, or pedestrians while it is green.
The green arrow is the one signal that has cleared the path for you rather than just opening it.
A green arrow gives you the right-of-way to travel in that direction. There should be no oncoming vehicles, crossing traffic, or pedestrians while the arrow is green.
On the test
What must a driver wait for at a solid red light before moving ahead?
Green, and a clear intersection. Green means your turn, not that the intersection is empty, and those are different things. Washington State Driver Guide, p.110: “Stop. Wait until the traffic light turns green and there are no vehicles or pedestrians in the intersection before you move 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 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