Idaho Road Signs Test (2026)
Every road sign on the Idaho exam, with what it means. Free and unlimited.
Smart Review drills only the questions you get wrong. Full-length mock exams in the real format. Progress saved on every device — and the same account unlocks the mobile app.
Get Smart Review & Mock ExamsWhat this test covers
This draw of 40 questions breaks down like this:
- Traffic Signs & Signals — 21
- Traffic Lanes, Passing & Turning — 6
- Sharing the Road — 5
- Right-of-Way & Intersections — 3
- Signaling & Communication — 2
- Speed Limits & Speed Management — 2
- Emergencies & Crashes — 1
Heaviest on Traffic Signs & Signals (21 of 40) — that is the section to revise first if you miss several here.
1 are Idaho-specific questions, drawn from the state handbook rather than general road rules.
Each test on this site draws a different set, so Test 1, 2 and 3 never repeat a question.
Questions on this test
1. A steady green arrow pointing left means:
- Left turns are prohibited
- You may turn left, but oncoming traffic has the right-of-way
- You have a protected left turn — oncoming traffic is stopped
- Yield to pedestrians only, then turn
Show answer
Answer: You have a protected left turn — oncoming traffic is stopped
A green arrow is a protected turn — traffic in the other direction is being held by a red light.
2. What does this sign tell you?
- Detour
- Two-way traffic
- Wrong way
- Traffic flows in one direction — the way the arrow points
Show answer
Answer: Traffic flows in one direction — the way the arrow points
A one-way sign means traffic moves only in the direction of the arrow.
3. A 'No U-Turn' sign is posted. You may:
- Not make a U-turn there
- U-turn only at night
- U-turn slowly
- U-turn anyway if clear
Show answer
Answer: Not make a U-turn there
Obey the sign — no U-turns where prohibited.
4. What does this sign warn of?
- Divided highway ends / two-way traffic
- One-way street
- Merging traffic
- Passing lane
Show answer
Answer: Divided highway ends / two-way traffic
Opposing arrows warn of two-way traffic ahead (e.g., a divided highway ending). Keep right.
5. A yield sign is shaped as a(n):
- Downward triangle
- Rectangle
- Octagon
- Circle
Show answer
Answer: Downward triangle
The yield sign is a downward-pointing triangle.
6. What does this sign mean?
- Right lane closed
- Road ends
- No right turn
- Sharp curve to the right ahead
Show answer
Answer: Sharp curve to the right ahead
A curved-arrow warning sign means the road curves to the right ahead — slow down.
7. What does this sign mean?
- Trucks are not allowed on this road
- Truck route
- Truck parking
- Weigh station
Show answer
Answer: Trucks are not allowed on this road
A truck with a red slash means trucks are prohibited on that road.
8. When turning, you should complete the turn in the:
- Center turn lane
- Shoulder
- Nearest legal lane
- Farthest lane
Show answer
Answer: Nearest legal lane
Turn into the nearest legal lane going your direction; don't swing wide across lanes.
9. What does this sign warn of?
- A pedestrian or school crossing
- A bus stop
- A hospital
- A playground only
Show answer
Answer: A pedestrian or school crossing
This bright yellow-green sign marks a pedestrian or school crossing — be ready to yield to people crossing.
10. What does this sign warn of?
- No right turn
- The right lane ends ahead — merge left
- Added lane
- Right turn only
Show answer
Answer: The right lane ends ahead — merge left
The right lane ends ahead; merge left when safe.
11. What does this hand signal mean?
- Right turn
- Left turn
- Speed up
- Stop or slow
Show answer
Answer: Left turn
Left arm straight out = a left turn.
12. A blue sign with a fork-and-knife or bed symbol indicates:
- A rest stop closed
- A warning
- A hospital only
- Food or lodging services nearby
Show answer
Answer: Food or lodging services nearby
Blue service signs use symbols for food, lodging, gas, and other services.
13. A pentagon-shaped sign means:
- Hospital
- No passing
- Dead end
- School zone or school crossing
Show answer
Answer: School zone or school crossing
The five-sided pentagon marks a school zone or crossing.
14. When merging, you should match the speed of highway traffic so you can:
- Force in
- Stop on the ramp
- Blend into a gap smoothly
- Slow everyone down
Show answer
Answer: Blend into a gap smoothly
Matching speed lets you merge into a gap without disrupting traffic.
15. You are following a large truck and cannot see its side mirrors. This means:
- You are at a safe distance
- The driver can still see you
- The truck driver probably cannot see you — drop back
- Nothing
Show answer
Answer: The truck driver probably cannot see you — drop back
If you can't see the truck's mirrors, the driver can't see you. Move back so you're visible.
16. A round sign always means:
- School
- Railroad crossing warning
- Stop
- Yield
Show answer
Answer: Railroad crossing warning
The only round sign is the railroad advance-warning sign.
17. What does this sign mean?
- No U-turn
- Stop
- Yield
- Do not enter
Show answer
Answer: Yield
A downward triangle is a YIELD sign — slow down and give the right-of-way; stop if needed.
18. At an uncontrolled T-intersection, the driver on the road that ends must:
- Stop only at night
- Go first
- Speed up
- Yield to traffic on the through road
Show answer
Answer: Yield to traffic on the through road
The through road has priority; the ending road yields.
19. The best place to be around a large truck is:
- Where you can see the driver's mirrors
- Right beside the cab
- In front, braking
- Directly behind it
Show answer
Answer: Where you can see the driver's mirrors
If you can see the mirrors, the driver can see you. Avoid the No-Zones.
20. A right turn should be made:
- Wide to the left
- From any lane
- From the lane nearest the right curb, close to the curb
- From the center lane
Show answer
Answer: From the lane nearest the right curb, close to the curb
Right turns start from the right-most lane, staying close to the curb.
21. In a highway work zone, you should:
- Speed up to get through
- Ignore the cones
- Change lanes rapidly
- Slow down, obey the posted work-zone limit, and watch for workers
Show answer
Answer: Slow down, obey the posted work-zone limit, and watch for workers
Slow down, follow the reduced limit, merge early, and watch for workers and equipment.
22. A motorcycle has the right to use:
- Half a lane
- Only shoulders
- Only bike lanes
- A full lane, like any vehicle
Show answer
Answer: A full lane, like any vehicle
Motorcycles are entitled to a full lane — never share it.
23. This sign shape warns of:
- A hospital
- A school zone or school crossing
- A railroad crossing
- A dead end
Show answer
Answer: A school zone or school crossing
The pentagon shape marks a school zone or school crossing ahead.
24. What does this sign warn of?
- A bike shop
- No bicycles
- A bike lane ends
- A bicycle crossing ahead — watch for cyclists
Show answer
Answer: A bicycle crossing ahead — watch for cyclists
A bicycle-crossing sign warns cyclists may cross the road ahead.
25. At a crosswalk, if the car ahead of you stops, you should:
- Speed around
- Honk
- Pass it
- Not pass — it may be stopping for a pedestrian you can't see
Show answer
Answer: Not pass — it may be stopping for a pedestrian you can't see
Never pass a vehicle stopped at a crosswalk; it may be yielding to a pedestrian.
26. On entering a sharp curve too fast, you risk:
- A ticket only
- Losing traction and running off the road
- Better handling
- Nothing
Show answer
Answer: Losing traction and running off the road
Too much speed in a curve can break traction and send you off the road — slow before it.
27. The maximum time you should spend in a truck's blind spot while passing is:
- 10 minutes
- As long as you like
- As little as possible — pass through it steadily
- Until it honks
Show answer
Answer: As little as possible — pass through it steadily
Move through a truck's blind spots quickly and steadily when passing.
28. In a skid, you should look and steer:
- Where you want the car to go
- Down at the pedals
- At the skid
- At oncoming traffic
Show answer
Answer: Where you want the car to go
Look and steer toward your intended path to recover from a skid.
29. A diamond-shaped sign with a truck on a downhill grade warns of:
- A truck stop
- A steep hill where trucks may move slowly
- A weigh station
- A no-truck zone
Show answer
Answer: A steep hill where trucks may move slowly
It warns of a steep downgrade; watch for slow-moving trucks.
30. A steady red arrow means:
- Turn in that direction after stopping
- You may not turn in the direction of the arrow — wait
- Proceed with caution
- Yield to pedestrians, then turn
Show answer
Answer: You may not turn in the direction of the arrow — wait
A red arrow means you must stop and may not make that movement until it changes.
31. What does this hand signal mean?
- Go
- Stop or slow
- Left turn
- Right turn
Show answer
Answer: Right turn
Left arm bent upward = a right turn.
32. A blue sign with a wheelchair symbol reserves parking for:
- People with a disabled parking permit
- Delivery trucks
- Buses
- Anyone
Show answer
Answer: People with a disabled parking permit
Blue wheelchair signs reserve parking for permit holders.
33. In a two-lane roundabout, you should choose your lane based on:
- Always the left
- The car ahead
- Your car color
- Where you plan to exit (signs show which lane for which exit)
Show answer
Answer: Where you plan to exit (signs show which lane for which exit)
Use lane-choice signs before the roundabout to pick the correct lane for your exit.
34. People with disabilities, seniors, and children may:
- Cross only at lights
- Need extra time to cross — be patient and yield
- Be ignored
- Always move fast
Show answer
Answer: Need extra time to cross — be patient and yield
Give vulnerable pedestrians extra time and space to cross.
35. You are driving and see this red sign facing you. It means:
- Yield
- Continue
- Speed up
- You are going the wrong way — do not proceed; turn around
Show answer
Answer: You are going the wrong way — do not proceed; turn around
A red 'Wrong Way' sign means you're headed against traffic — stop and turn around safely.
36. What does this sign warn of?
- A rest stop
- A right turn only
- A merge
- A side road entering from the right
Show answer
Answer: A side road entering from the right
A side-road sign warns that another road joins from the right; watch for vehicles entering.
37. The shape of a warning sign is usually a:
- Rectangle
- Diamond
- Circle
- Octagon
Show answer
Answer: Diamond
Most warning signs are yellow diamonds.
38. Turning left, you should give way to:
- No one
- Oncoming traffic and pedestrians in the crosswalk
- Only bikes
- Only trucks
Show answer
Answer: Oncoming traffic and pedestrians in the crosswalk
Yield to oncoming traffic and crossing pedestrians before turning left.
39. A red-and-white striped 'DO NOT ENTER' or 'WRONG WAY' sign is meant to:
- Mark a school
- Guide you to services
- Show distances
- Keep you from driving into oncoming traffic
Show answer
Answer: Keep you from driving into oncoming traffic
These signs stop you from entering a road the wrong way against traffic.
40. As speed rises, stopping distance:
- Is irrelevant
- Increases sharply
- Decreases
- Stays the same
Show answer
Answer: Increases sharply
Higher speed greatly increases stopping distance.