Idaho: Road signs Practice Test
Regulatory, warning, work zone, school, guide signs and barricades shown in the Idaho Driver's Handbook.
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Questions are original and based on the official manual "Idaho Driver's Handbook" (July 2026), Idaho Transportation Department.
All 31 questions in this practice test
Take the test above first, then use this list to study. Tap “Show answer” to see the correct answer and explanation.
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Besides traffic signals, signs and pavement markings, who else may provide traffic control that you must obey?
- Law enforcement officers, highway personnel, or school crossing guards
- Only law enforcement officers and emergency medical technicians
- Only taxi drivers, bus drivers, and tow truck operators
- Any pedestrian who is standing in the roadway
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Correct answer: Law enforcement officers, highway personnel, or school crossing guards
Traffic control may also be provided by law enforcement officers, highway personnel, or school crossing guards, and you must obey these directions.
Source: Idaho Driver's Handbook (July 2026), page 44 · Open this page in the manual (Manual page 44)
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A stop sign has a clearly marked stop line. Where must you stop?
- Just past the line, in the crosswalk
- In the middle of the intersection
- At the far side of the intersecting road
- At the clearly marked stop line
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Correct answer: At the clearly marked stop line
At a stop sign you must stop at a clearly marked stop line.
Source: Idaho Driver's Handbook (July 2026), page 44 · Open this page in the manual (Manual page 44)
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At a stop sign with no stop line but with a crosswalk, where must you stop?
- Before entering the crosswalk on the near side of the intersection
- After entering the crosswalk, so you can see cross traffic
- On the far side of the intersection, past the crosswalk
- In the center of the intersection, where you can see clearly
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Correct answer: Before entering the crosswalk on the near side of the intersection
If there is no stop line, you stop before entering the crosswalk on the near side of the intersection.
Source: Idaho Driver's Handbook (July 2026), page 44 · Open this page in the manual (Manual page 44)
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At a stop sign with no stop line and no crosswalk, where must you stop?
- Back from the intersecting highway at the point where the sign is first visible
- At the center of the intersecting highway, where you can see in both directions
- At the point nearest the intersecting highway where you can see approaching traffic
- Beside the intersecting highway, after crossing its near edge to get a view
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Correct answer: At the point nearest the intersecting highway where you can see approaching traffic
With no stop line and no crosswalk, you stop at the point nearest the intersecting highway where you have a view of approaching traffic.
Source: Idaho Driver's Handbook (July 2026), page 44 · Open this page in the manual (Manual page 44)
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What does a Do Not Enter sign mean?
- You may not enter this section of highway from the direction you are traveling
- The road ahead is closed to all traffic coming from both directions
- Only vehicles making a right turn may enter this section of road
- Enter only after stopping and yielding to all traffic that is already on the road
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Correct answer: You may not enter this section of highway from the direction you are traveling
A Do Not Enter sign means you may not enter this section of highway from the direction you are traveling.
Source: Idaho Driver's Handbook (July 2026), page 45 · Open this page in the manual (Manual page 45)
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What does a Speed Limit sign show?
- The speed at which you must always travel on that road section
- The recommended speed for the road section when it is wet
- The maximum speed on a section of road under ideal driving conditions
- The average speed of traffic on a section of road
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Correct answer: The maximum speed on a section of road under ideal driving conditions
A Speed Limit sign gives the maximum speed limit on a section of road under ideal driving conditions.
Source: Idaho Driver's Handbook (July 2026), page 45 · Open this page in the manual (Manual page 45)
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A white rectangular sign shows a black arrow curving to the right around a black island shape. What does it tell you?
- The road ahead ends at a barrier, so you must turn right at the island
- The road ahead is divided; stay on the right side of the island or barrier
- Traffic may pass on either side of the island, so keep your speed
- Divided road ahead; stay on the left side of the island or barrier
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Correct answer: The road ahead is divided; stay on the right side of the island or barrier
The Keep Right of Island sign means the road ahead is divided and you stay on the right side of the island or barrier.
Source: Idaho Driver's Handbook (July 2026), page 45 · Open this page in the manual (Manual page 45)
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A white sign shows a red circle with a diagonal slash over a black arrow that curves back on itself. What does this sign prohibit?
- A left turn
- A right turn
- Passing another vehicle
- A U-turn
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Correct answer: A U-turn
The page shows this red circle and slash sign as the No U-Turn turn prohibition sign.
Source: Idaho Driver's Handbook (July 2026), page 46 · Open this page in the manual (Manual page 46)
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A white rectangular sign shows a black arrow pointing straight up above the word ONLY. What does this lane control sign tell you?
- Proceed straight
- Left turn only
- Right turn only
- No U-turn
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Correct answer: Proceed straight
The page lists this sign with the arrow pointing up and the word ONLY as the Proceed Straight lane control sign.
Source: Idaho Driver's Handbook (July 2026), page 46 · Open this page in the manual (Manual page 46)
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A white rectangular sign shows a black arrow curving to the right above the word ONLY. What does this lane control sign tell you?
- No right turn
- Proceed straight
- Right turn only
- Left turn only
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Correct answer: Right turn only
The page lists this sign with the curved right arrow and the word ONLY as the Right Turn Only lane control sign.
Source: Idaho Driver's Handbook (July 2026), page 46 · Open this page in the manual (Manual page 46)
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What do warning signs do?
- Warn you about an unexpected condition
- Tell you the maximum speed allowed on a road section
- Tell you which lane to use for a turn
- Mark roads that are closed to traffic
Show answer
Correct answer: Warn you about an unexpected condition
Warning signs warn you about an unexpected condition, and you may need to slow down or take other action.
Source: Idaho Driver's Handbook (July 2026), page 49 · Open this page in the manual (Manual page 49)
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What does the Open Range warning sign mean?
- Cattle trucks use the road and may stop suddenly ahead
- A farm vehicle entrance where tractors enter the road ahead
- Livestock have the right-of-way and may roam freely, unfenced
- Wildlife may cross the road ahead, so reduce your speed
Show answer
Correct answer: Livestock have the right-of-way and may roam freely, unfenced
The Open Range sign means you are in an area where livestock have the right-of-way and may roam freely and unfenced.
Source: Idaho Driver's Handbook (July 2026), page 49 · Open this page in the manual (Manual page 49)
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A yellow diamond-shaped sign shows a black "T" symbol. What does it tell you?
- A road joins from the right ahead, and your road continues straight through
- You are approaching a 3-way T intersection and will have to turn right or left
- Two roads cross ahead, so watch carefully for cross-traffic
- Traffic ahead merges into your lane from the side, so be prepared
Show answer
Correct answer: You are approaching a 3-way T intersection and will have to turn right or left
This is the 3-way Intersection sign: you are approaching a 3-way T intersection and will have to turn either right or left.
Source: Idaho Driver's Handbook (July 2026), page 49 · Open this page in the manual (Manual page 49)
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A yellow diamond-shaped sign shows a black plus symbol. What does it tell you?
- Another road crosses yours ahead; watch for cross-traffic
- A road ahead joins yours from one side only; keep right
- Two highways are converging, so watch for traffic in the left lane
- The road ahead is divided by a center strip; stay right
Show answer
Correct answer: Another road crosses yours ahead; watch for cross-traffic
The Intersection/Crossroad sign means another road ahead crosses the road you are on, so watch carefully for cross-traffic.
Source: Idaho Driver's Handbook (July 2026), page 49 · Open this page in the manual (Manual page 49)
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Where are Traffic Signal Ahead signs used?
- At intersections that have a railroad crossing nearby
- Where a traffic signal has failed or is now flashing
- On higher speed roads or where the view of the light is blocked
- Only in work zones where flaggers are present
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Correct answer: On higher speed roads or where the view of the light is blocked
These signs are used on roads with higher speeds or where the view of the intersection or light is blocked.
Source: Idaho Driver's Handbook (July 2026), page 49 · Open this page in the manual (Manual page 49)
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A yellow diamond-shaped sign shows a red, yellow and green signal. What should you be ready for?
- A railroad crossing with flashing lights
- An intersection and a stop light
- A school crossing with a flashing beacon
- A flagger directing traffic
Show answer
Correct answer: An intersection and a stop light
The Traffic Signal Ahead sign tells you to be ready for an intersection and a stop light.
Source: Idaho Driver's Handbook (July 2026), page 49 · Open this page in the manual (Manual page 49)
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You are on the main road and see a yellow diamond-shaped sign with a straight arrow and a smaller line joining it from the side. What should you be prepared for?
- Your lane ending in a short distance
- Traffic ahead from the other two directions stopping
- A divided highway ending ahead
- Other cars and trucks entering into your lane
Show answer
Correct answer: Other cars and trucks entering into your lane
On the main road, the Merging Traffic sign means you should be prepared for other cars and trucks entering your lane.
Source: Idaho Driver's Handbook (July 2026), page 50 · Open this page in the manual (Manual page 50)
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A yellow diamond-shaped sign shows one arrow pointing down beside one arrow pointing up. What does it warn about?
- A change from a multi-lane divided highway to a two-lane, two-way section
- A change from a two-lane road to a multi-lane divided highway
- A one-way street ahead where all traffic must stay in the right lane
- A lane that ends ahead where two lanes of traffic become one
Show answer
Correct answer: A change from a multi-lane divided highway to a two-lane, two-way section
The Two-Way Traffic sign warns about a transition from a multi-lane divided highway to a two-lane, two-way section of highway.
Source: Idaho Driver's Handbook (July 2026), page 50 · Open this page in the manual (Manual page 50)
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What does the Lane Ends/Merge Left sign mean?
- Two highways are converging, so watch the left lane
- A multi-lane highway changes to a two-way road ahead
- Two lanes of traffic will soon become one lane
- A lane is being added on the right ahead
Show answer
Correct answer: Two lanes of traffic will soon become one lane
The Lane Ends/Merge Left sign means two lanes of traffic will soon become one lane.
Source: Idaho Driver's Handbook (July 2026), page 50 · Open this page in the manual (Manual page 50)
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What does the Added Lane sign mean?
- Two lanes of traffic will soon become one lane
- A multi-lane divided highway changes to a two-way road ahead
- Other vehicles will enter your lane from a side road
- Two highways are converging, so watch for traffic in the left lane
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Correct answer: Two highways are converging, so watch for traffic in the left lane
The Added Lane sign means two highways are converging, and traffic in the left lane may move into the right lane.
Source: Idaho Driver's Handbook (July 2026), page 50 · Open this page in the manual (Manual page 50)
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At an Added Lane sign, what should you do before moving into the left lane, if needed?
- Check that it is clear while signaling before changing lanes
- Sound your horn to warn traffic in the left lane
- Speed up so you can pass the traffic in the left lane
- Stop in the right lane until the left lane is clear
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Correct answer: Check that it is clear while signaling before changing lanes
Before moving into the left lane you check that it is clear while signaling before changing lanes.
Source: Idaho Driver's Handbook (July 2026), page 50 · Open this page in the manual (Manual page 50)
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What does a School Zone sign tell you?
- A school bus will stop ahead, so you must stop and wait for it
- The speed limit ahead is reduced during school hours only
- You are nearing a school area with a crossing; watch for children
- School zone speed limits end here and normal speed may resume
Show answer
Correct answer: You are nearing a school area with a crossing; watch for children
The School Zone sign means you are nearing a school area with a crossing, so watch for children and the marked crossing.
Source: Idaho Driver's Handbook (July 2026), page 50 · Open this page in the manual (Manual page 50)
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A five-sided sign shows two children walking, with a diagonal arrow on a plaque below. What should you do when you see it?
- Watch out for children, reduce speed, and obey crossing guard signals
- Stop completely and wait until every child has left the area
- Speed up to clear the crossing before children step out
- Pull over to the right and let school buses go first
Show answer
Correct answer: Watch out for children, reduce speed, and obey crossing guard signals
The school crossing sign tells drivers to watch for children, reduce speed, and obey crossing guard signals.
Source: Idaho Driver's Handbook (July 2026), page 51 · Open this page in the manual (Manual page 51)
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What does the Divided Highway Begins sign tell you?
- Two-way traffic ahead will soon be divided by a center strip
- The road ahead narrows to a single lane in each direction
- A one-way street begins at the next intersection
- Traffic ahead will merge into a single lane
Show answer
Correct answer: Two-way traffic ahead will soon be divided by a center strip
The Divided Highway Begins sign warns that two-way traffic is about to be divided by a center strip.
Source: Idaho Driver's Handbook (July 2026), page 51 · Open this page in the manual (Manual page 51)
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What should you do when you see the Divided Highway Ends sign?
- Move to the left lane to prepare for a turn
- Speed up to clear the end of the center strip
- Expect a one-way street ahead
- Watch out for oncoming cars
Show answer
Correct answer: Watch out for oncoming cars
The sign warns that two-way traffic ahead will no longer be divided, so you must watch for oncoming cars.
Source: Idaho Driver's Handbook (July 2026), page 51 · Open this page in the manual (Manual page 51)
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A yellow diamond sign shows a measurement in feet and inches with arrows pointing up and down. What does this Low Clearance sign indicate?
- The road ahead dips below the level of the surrounding land
- The overhead clearance above the highway is very low
- The maximum weight allowed on the bridge is limited
- The lanes ahead are narrower than the normal highway width
Show answer
Correct answer: The overhead clearance above the highway is very low
The Low Clearance sign indicates the overhead clearance above the highway is very low.
Source: Idaho Driver's Handbook (July 2026), page 51 · Open this page in the manual (Manual page 51)
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A yellow diamond sign shows a car with curved skid marks behind it. What should you do when you see it?
- Turn on your hazard lights and stop at the roadside
- Switch to the left lane to avoid water on the road
- Keep your speed because the pavement is only damp
- Slow down, because the road may become slippery when wet
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Correct answer: Slow down, because the road may become slippery when wet
The Slippery When Wet sign warns that the road may become slippery in wet weather, so you should slow down.
Source: Idaho Driver's Handbook (July 2026), page 52 · Open this page in the manual (Manual page 52)
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What should you do before going down a hill when you see the Hill warning sign, which shows a truck on a steep slope?
- Check your brakes
- Shift into neutral to save fuel
- Turn off your headlights to avoid glare
- Stop completely at the top of the hill
Show answer
Correct answer: Check your brakes
The Hill sign warns that the road goes down a steep hill, and the manual says you should check your brakes before going down.
Source: Idaho Driver's Handbook (July 2026), page 52 · Open this page in the manual (Manual page 52)
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Where will the pennant-shaped No Passing Zone sign be placed?
- On the right-hand side of the road only
- Hanging above the center of the lane
- On the left-hand side of the road or highway
- On the median at every intersection
Show answer
Correct answer: On the left-hand side of the road or highway
The pennant-shaped No Passing Zone sign is on the left-hand side of the road or highway.
Source: Idaho Driver's Handbook (July 2026), page 52 · Open this page in the manual (Manual page 52)
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What does the pennant-shaped No Passing Zone sign warn you of?
- A no passing zone for your lane of traffic
- A passing lane that begins just ahead
- A no passing zone for oncoming traffic only
- A section of road where passing is encouraged
Show answer
Correct answer: A no passing zone for your lane of traffic
The pennant-shaped sign warns of a no passing zone for your lane of traffic.
Source: Idaho Driver's Handbook (July 2026), page 52 · Open this page in the manual (Manual page 52)
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What does the Animal Crossing warning sign, such as a leaping deer, tell drivers to do?
- Stop and wait until the animals have left the road
- Honk to scare animals away from the road
- Watch for animals crossing the highway
- Expect a steep downhill grade ahead
Show answer
Correct answer: Watch for animals crossing the highway
The Animal Crossing sign warns drivers to watch for animals crossing the highway.
Source: Idaho Driver's Handbook (July 2026), page 53 · Open this page in the manual (Manual page 53)