Question 1 of 20Road signs
Idaho road signs test: free practice
Idaho road signs test: free practice with 20 sign questions.
Road-sign questions
Question 2 of 20Road signs
You are in the lane that this sign says will end. What should you do?
Question 3 of 20Road signs
What does this sign warn you about?
Question 4 of 20Road signs
What is not allowed where this sign is posted?
Question 5 of 20Road signs
What is this sign warning you about?
Question 6 of 20Road signs
What should you do when you see this sign?
Question 7 of 20Road signs
What does this sign mean?
Question 8 of 20Road signs
What does this sign warn of?
Question 9 of 20Road signs
When you reach this sign, what must you do?
Question 10 of 20Road signs
What should you be ready to do after you pass this sign?
Question 11 of 20Road signs
You are on the main road and see this sign. What is the best thing to do?
Question 12 of 20Road signs
What does this sign warn you about?
Question 13 of 20Road signs
What does this sign tell you is ahead?
Question 14 of 20Road signs
What does this sign mean?
Question 15 of 20Road signs
Why is this sign placed on the left side of the road?
Question 16 of 20Road signs
What does this sign tell you to do?
Question 17 of 20Road signs
You pass this sign, but rain is falling hard and you cannot see well. What should you do?
Question 18 of 20Road signs
What does this sign warn you about?
Question 19 of 20Road signs
What does this sign mean?
Question 20 of 20Road signs
Where are you most likely to see this sign?
1 of 20
Answer each question to see the explanation. Keyboard: A–D or 1–4 to answer, N next, P previous.
Answers and explanations (text version)
The correct answer to each question above, why it is right, and where it comes from. Try the test first.
Question 1: D. A railroad crossing is ahead
The round yellow sign with an X warns of a railroad crossing ahead. Slow down, look and listen for trains.
Handbook: Chapter: Traffic signs — Warning signs
Question 2: C. Signal and merge when there is a safe gap
When your lane ends, signal early and merge into the next lane when there is a safe gap.
Handbook: Chapter: Traffic signs — Warning signs
Question 3: B. The road curves to the right ahead
This curve sign means the road bends to the right ahead. Slow down before you reach the curve.
Handbook: Chapter: Traffic signs — Warning signs
Question 4: D. Turning left
This sign bans left turns. You may go straight or turn right if those moves are allowed.
Handbook: Chapter: Traffic signs — Regulatory signs
Question 5: D. The bridge ahead is narrower than the road
The narrow bridge sign means the bridge is narrower than the road. Slow down and watch for oncoming vehicles.
Handbook: Chapter: Traffic signs — Warning signs
Question 6: B. Slow down and get ready to stop
This sign warns of a stop sign ahead. Slow down so you can stop at it.
Handbook: Chapter: Traffic signs — Warning signs
Question 7: D. The right lane ends ahead
The right edge line bends in toward the center, which means the right lane ends ahead and drivers in it must move left.
Handbook: Chapter: Traffic signs — Warning signs
Question 8: A. A sharp right turn that needs a low speed
The bent arrow means a sharp turn to the right, which needs a much lower speed than a gentle curve.
Handbook: Chapter: Traffic signs — Warning signs
Question 9: C. Stop completely, then go when it is safe
This is a stop sign. You must come to a full stop and move on only when the way is clear.
Handbook: Chapter: Traffic signs — Regulatory signs
Question 10: D. Follow the signals of a worker directing traffic
This sign warns of a flagger ahead. A flagger directs traffic with signals that you must obey.
Handbook: Chapter: Traffic signs — Work zone signs
Question 11: A. Watch for cars joining and adjust your speed
At a merge, both drivers share the job. Watch for cars joining and adjust your speed or lane to help them merge.
Handbook: Chapter: Traffic signs — Warning signs
Question 12: C. Another lane of traffic will join yours
The merge sign warns that traffic from another lane or ramp will join your lane ahead.
Handbook: Chapter: Traffic signs — Warning signs
Question 13: B. Another road crosses yours
The cross symbol warns of a crossroad ahead. Watch for traffic coming from both sides.
Handbook: Chapter: Traffic signs — Warning signs
Question 14: D. You may not park here
This is a no parking sign. You may not leave your car parked in the area it covers.
Handbook: Chapter: Traffic signs — Regulatory signs
Question 15: C. So a driver about to pass will see it
A driver getting ready to pass looks to the left, so the no-passing zone pennant is placed there where it will be seen.
Handbook: Chapter: Traffic signs — Warning signs
Question 16: A. Let traffic with the right-of-way go first
A yield sign means you slow down and let traffic and people with the right-of-way go first, stopping if you need to.
Handbook: Chapter: Traffic signs — Regulatory signs
Question 17: D. Drive slower than the posted speed
The posted speed is the most you may drive in good conditions. In heavy rain you must drive slower than that to stay safe.
Handbook: Chapter: Traffic signs — Regulatory signs
Question 18: B. The road may be slick when it is wet
This slippery when wet sign means the road gets slick in rain. Slow down and avoid sudden braking or steering.
Handbook: Chapter: Traffic signs — Warning signs
Question 19: B. You must not drive onto this road from here
This sign means do not enter. You must not drive onto the road or ramp from this direction.
Handbook: Chapter: Traffic signs — Regulatory signs
Question 20: C. At the end of a one-way road or exit ramp
Do not enter signs face drivers at the wrong end of a one-way road or a highway exit ramp, so no one drives in against traffic.
Handbook: Chapter: Traffic signs — Regulatory signs
US traffic signs as shown in the Idaho Driver's Handbook ('Signs, Signals, & Pavement Markings': traffic, turn prohibition and lane control, work zone, warning and guide signs, traffic signals). 16 correct (80%) is our practice mark, not an official pass mark.
United States road signs and what they mean
Our own simplified drawings of the signs learners meet most. The full list, with meanings, is in the United States sign library; the official reference is the Idaho Driver's Handbook.
Regulatory signs
Come to a complete stop at the line, crosswalk or intersection edge, then go only when the way is clear.
Slow down and let traffic and pedestrians that have the right-of-way go first, stopping if needed.
The highest legal speed on this road under ideal conditions.
You must not drive into this road or ramp from this direction.
You are driving against traffic; stop safely and turn around.
Traffic on this road moves only in the direction of the arrow.
Left turns are not allowed here.
Right turns are not allowed here.
Turning around to go back the way you came is not allowed here.
You may not turn while the signal is red, even after stopping.
Pass to the right of the island or obstruction ahead.
Overtaking other vehicles is not allowed on this stretch.
You may not park here; stopping briefly to load or unload may still be allowed where local rules say so.
Vehicles in this lane must turn left.
Marks the crossing itself; yield to any train and stop if one is coming.
Warning signs
Marks the start of a stretch where passing is not allowed; it sits on the left side of the road.
The road bends gently to the right ahead; slow down before the bend.
The road turns sharply right ahead; slow down a lot before the turn.
A series of bends lies ahead; keep speed down until the road straightens.
Another road crosses yours ahead; watch for traffic from both sides.
A road joins from the right ahead; expect vehicles entering.
The road you are on ends ahead at a crossing road; be ready to turn left or right.
Traffic from another lane or ramp will join yours ahead; adjust speed so both can merge safely.
The right lane ends ahead; drivers in it must move left when safe.
A median will separate the two directions of traffic ahead; keep right of it.
The median ends ahead and traffic in both directions will share one road.
You are leaving a one-way road; oncoming traffic will use the same road ahead.
There is a traffic light ahead; be ready to stop.
A stop sign is coming up; slow down and prepare to stop.
A yield sign is coming up; slow down and be ready to give way.
People may be crossing ahead; slow down and yield to anyone in the crosswalk.
A school is near and children may be crossing; slow down and obey any school speed limit.
A railroad crossing is ahead; slow down, look and listen for trains.
The surface gets slick in rain; slow down and avoid sudden braking or steering.
Deer often cross here, especially at dawn and dusk; slow down and watch the roadsides.
A steep downgrade is ahead; check your speed and use a lower gear.
The bridge ahead is narrower than the road; slow down and watch for oncoming vehicles.
Marks the outside of a sharp curve and shows the direction to steer.
Temporary signs
Construction is ahead; slow down, expect changes and obey work-zone signs.
A worker is directing traffic ahead; follow their signals.
People are working on or next to the road; slow down and give them space.
The usual route is closed; follow the detour signs in the arrow direction.