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Washington driving lesson · Signs and Signals

Traffic lights, arrows, and ramp meters

A 3-minute lesson from the Washington course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Signs and Signals
Checkpoint questions
6
Source pages
110, 111, 112, 113

Each light color and shape has one exact meaning. Flashing lights change a signal into a sign: flashing red is a stop sign, flashing yellow is a yield sign. Arrows apply only to the direction they point.

Traffic signals

Traffic signals
SignalWhat to do
Solid redStop; wait for green and a clear intersection
Flashing redTreat like a stop sign: stop, then go when it's your turn
Red arrowYou can't go in the arrow's direction
Solid yellowLight is changing to red; slow and prepare to stop
Flashing yellowSame as a yield sign; treat as uncontrolled intersection
Yellow arrowTurning red soon; prepare to stop, yield to oncoming
Solid greenGo once the intersection is clear
Green arrowGo that way; you have the right-of-way
Handbook p. 110 ↗
Steady red light
Solid red light

Know the rule

After a complete stop at a red light, you may turn right, or turn left onto a one-way street, if there's no "no turn on red" sign and you have plenty of room to enter traffic.

Handbook p. 110 ↗

Know the rule

If you're already in the intersection when the light turns yellow, continue through at the posted speed.

Handbook p. 111 ↗

Know the rule

You may not accelerate beyond the posted speed limit to enter or clear an intersection on yellow.

Handbook p. 111 ↗
Red arrow
Yellow arrows

Know the rule

On a solid green, wait for the intersection to clear, and yield to emergency vehicles and pedestrians.

Handbook p. 112 ↗

Know the rule

Turning left on a green light, yield to approaching vehicles: oncoming traffic has the right-of-way. Pause where you can see oncoming traffic, then turn at a break.

Handbook p. 112 ↗

Know the rule

With a green arrow there should be no oncoming vehicles, crossing traffic, or pedestrians in your path.

Handbook p. 112 ↗
Green arrow
Green arrows

Know the rule

You won't see a flashing green light in Washington. In British Columbia, Canada, it warns that pedestrians are waiting to cross.

Handbook p. 112 ↗

Know the rule

Freeway ramp meters work like regular signals: on red, stop at the white stop line; on green, continue along the on-ramp.

Handbook p. 113 ↗

Put it into practice

You're stopped at a red light, wanting to turn left from a one-way street onto another one-way street. With no "no turn on red" sign and a safe gap, you may turn after your complete stop.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

After a complete stop at a red light with no 'no turn on red' sign, which turns may you make if there's room?
  1. Left onto a two-way street
  2. Neither turn is ever allowed on red
  3. Right, or left onto one-way streets
  4. Right only, never left

Answer: Right, or left onto one-way streets

After stopping fully, you can turn right, or turn left onto a one-way street, if there's no restricting sign and room to enter.

Handbook p. 110 ↗
What does a flashing red traffic light mean?
  1. The signal is malfunctioning and can be ignored
  2. Treat it like a stop sign
  3. Slow down but you don't have to stop
  4. Proceed with caution

Answer: Treat it like a stop sign

A flashing red light functions exactly like a stop sign.

Handbook p. 110 ↗
What does a flashing yellow traffic light mean?
  1. Slow down; it has the same meaning as a yield sign
  2. Stop completely, just like a red light
  3. Proceed at normal speed
  4. It only applies to pedestrians

Answer: Slow down; it has the same meaning as a yield sign

A flashing yellow light has the same meaning as a yield sign; treat the intersection as uncontrolled.

Handbook p. 111 ↗
You're already in the intersection when the light turns yellow. What should you do?
  1. Stop immediately, even in the intersection
  2. Stop at the far crosswalk and wait
  3. Speed up beyond the limit to clear it
  4. Continue through at the posted speed

Answer: Continue through at the posted speed

If you're in the intersection when it turns yellow, continue through at the posted speed rather than stopping.

Handbook p. 111 ↗
Is it legal to accelerate above the posted speed limit to beat a yellow light and clear the intersection?
  1. Yes, if no pedestrians are present
  2. Yes, up to 10 mph over the limit
  3. No, that's not allowed
  4. Yes, if you're already moving

Answer: No, that's not allowed

You are not allowed to accelerate beyond the posted speed limit to enter or clear an intersection on yellow.

Handbook p. 111 ↗
Turning left at a green light, oncoming traffic is present. Who has the right-of-way?
  1. Whoever arrived first
  2. The vehicle already in the intersection
  3. The oncoming traffic
  4. The turning vehicle, since the light is green

Answer: The oncoming traffic

When turning left at a green light, you must yield to approaching vehicles, which have the right-of-way.

Handbook p. 112 ↗
Take the lesson checkpoint in the app

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