Idaho road sign library
Every sign, signal and marking the Idaho driver manual shows or names, with its meaning in the manual's words and its page.
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Regulatory signs - Idaho
STOP
When approaching a stop sign, you must stop at a clearly marked stop line. If no stop line, then stop before entering the crosswalk on the near side of the intersection. If no crosswalk, then stop at the point nearest the intersecting highway where the driver has a view of approaching traffic on the intersecting highway before entering it.
Manual page 44 · Open this page in the manual (Manual page 44)
YIELD
Yield right-of-way. You must slow down and yield the right-of-way to other vehicles and pedestrians in the intersection you are crossing or highway you are entering. If necessary, stop before crossing the intersection or entering the highway. If pedestrians are in or about to enter the crosswalk, stop until they have crossed the highway, then proceed. Slow down, so that you may safely yield the right-of-way to other vehicles or pedestrians.
Manual page 44 · Open this page in the manual (Manual page 44)
DO NOT ENTER
You may not enter this section of highway from the direction you are traveling.
Manual page 45 · Open this page in the manual (Manual page 45)
SPEED LIMIT 50
The maximum speed limit on a section of road (under ideal driving conditions).
Manual page 45 · Open this page in the manual (Manual page 45)
See them all (31) · Regulatory signs →
Warning and work zone signs - Idaho
Lane Shift
All lanes will shift according to the sign. Stay in your lane as it shifts slightly.
Manual page 46 · Open this page in the manual (Manual page 46)
Be Prepared to Stop (Flagger Symbol)
Slow down and be prepared to stop for road work ahead.
Manual page 47 · Open this page in the manual (Manual page 47)
Slow Moving Vehicle Sign
You are approaching a slow moving vehicle. You should slow down and approach the vehicle with caution. This sign is primarily used on off road vehicles (farm equipment, construction equipment, etc.).
Manual page 47 · Open this page in the manual (Manual page 47)
ROAD CLOSED
“Road Closed” signs mean that the work zone cannot be entered, except by authorized personnel.
Manual page 47 · Open this page in the manual (Manual page 47)
See them all (31) · Warning and work zone signs →
Guide and service signs - Idaho
Telephone Symbol
Guide signs are either white on green for directional and distance, white on blue for motorist’s services, or white on brown for cultural, historical, or scenic points of interest.
Manual page 53 · Open this page in the manual (Manual page 53)
Hospital Symbol (H)
Guide signs are either white on green for directional and distance, white on blue for motorist’s services, or white on brown for cultural, historical, or scenic points of interest.
Manual page 53 · Open this page in the manual (Manual page 53)
Tent Camping Symbol
Guide signs are either white on green for directional and distance, white on blue for motorist’s services, or white on brown for cultural, historical, or scenic points of interest.
Manual page 53 · Open this page in the manual (Manual page 53)
Trailer Camping Symbol
Guide signs are either white on green for directional and distance, white on blue for motorist’s services, or white on brown for cultural, historical, or scenic points of interest.
Manual page 53 · Open this page in the manual (Manual page 53)
See them all (23) · Guide and service signs →
Traffic signals - Idaho
Red Light
A steady red circular indication means stop. Come to a complete stop before you reach the stop line, crosswalk, or intersection. You can make a turn on a red light unless posted “no turn on red.”
Manual page 55 · Open this page in the manual (Manual page 55)
Yellow Light
A yellow light means caution. An amber or yellow circular indication warns that the signal is about to change to red. If you have not entered the intersection and can come to a safe stop, you should do so. If you are already in the intersection, you should continue moving and clear it safely.
Manual page 55 · Open this page in the manual (Manual page 55)
Green Circular Light
A green circular indication means “go.” You may proceed forward. If you are in the left-turn lane, you must yield to oncoming traffic and pedestrians in crosswalks before turning left. You should not enter the intersection unless there is sufficient space on the other side of the intersection for your vehicle to completely pass through the intersection, so you are not blocking the intersection, regardless of a traffic control signal to proceed.
Manual page 55 · Open this page in the manual (Manual page 55)
Flashing Red Light
A flashing red indication means stop. You must come to a complete stop, yield to cross traffic or pedestrians, and then proceed when clear.
Manual page 55 · Open this page in the manual (Manual page 55)
See them all (18) · Traffic signals →
Pavement markings - Idaho
A Dashed Yellow Line
A dashed yellow line means that vehicles in either lane can cross the line if it is safe to do so.
Manual page 58 · Open this page in the manual (Manual page 58)
Double Solid Yellow Lines
Two solid yellow lines mean that neither lane of traffic can cross the lines unless they are turning (if it is safe to do so). A driver can cross a double yellow line when turning left into or out of a driveway or entrance to a business. No passing is allowed.
Manual page 58 · Open this page in the manual (Manual page 58)
A Solid Yellow Line and A Dashed Yellow Line
One solid yellow line and one dashed yellow line means that only vehicles in the lane with the dashed line ... can cross the lines to pass other vehicles.
Manual page 58 · Open this page in the manual (Manual page 58)
Shared Lanes (Center Left-Turn Lane)
Center lanes are reserved for making left turns (or U-turns when they are permitted) from either direction of travel. Shared center lanes are marked on each side by a solid and yellow dashed lines. You may not travel in the shared turn lanes or interfere with another vehicle preparing to make a turn from the center turn lane.
Manual page 58 · Open this page in the manual (Manual page 58)
See them all (15) · Pavement markings →
Railroad crossings - Idaho
Railroad Crossing (Advance Warning)
This sign gives you early warning of a railroad crossing(s) ahead. Be prepared to stop before you get to the tracks if a train is approaching the crossing.
Manual page 52 · Open this page in the manual (Manual page 52)
Emergency Notification System Sign
This sign is posted at or near a railroad crossing and lists the railroad’s phone number along with the location specific crossing number. The sign displays information needed to notify the railroad of an emergency situation or of a warning device malfunction.
Manual page 53 · Open this page in the manual (Manual page 53)
Crossroad with Railroad Track Ahead
The manual does not state it
Manual page 60 · Open this page in the manual (Manual page 60)
See them all (10) · Railroad crossings →
More signs from our practice questions
A stop sign has a clearly marked stop line. Where must you stop?
At the clearly marked stop line
Source: Idaho Driver's Handbook (July 2026), page 44 · Open this page in the manual (Manual page 44)
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
Source: Idaho Driver's Handbook (July 2026), page 44 · Open this page in the manual (Manual page 44)
At a stop sign with no stop line and no crosswalk, where must you stop?
At the point nearest the intersecting highway where you can see approaching traffic
Source: Idaho Driver's Handbook (July 2026), page 44 · Open this page in the manual (Manual page 44)
What does a Do Not Enter sign mean?
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)
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 U-turn
Source: Idaho Driver's Handbook (July 2026), page 46 · Open this page in the manual (Manual page 46)
What does the manual say to do about barriers and signs on a road that is closed to traffic?
Do not go around or move them to cross over the road
Source: Idaho Driver's Handbook (July 2026), page 46 · Open this page in the manual (Manual page 46)
What does a "Road Closed" sign in a work zone mean?
The work zone cannot be entered, except by authorized personnel
Source: Idaho Driver's Handbook (July 2026), page 47 · Open this page in the manual (Manual page 47)
An orange diamond-shaped sign shows a figure holding a flag. What should you do?
Slow down and be prepared to stop for road work ahead
Source: Idaho Driver's Handbook (July 2026), page 47 · Open this page in the manual (Manual page 47)
A yellow diamond-shaped sign shows a black plus symbol. What does it tell you?
Another road crosses yours ahead; watch for cross-traffic
Source: Idaho Driver's Handbook (July 2026), page 49 · Open this page in the manual (Manual page 49)
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?
Other cars and trucks entering into your lane
Source: Idaho Driver's Handbook (July 2026), page 50 · Open this page in the manual (Manual page 50)
What may flashing lights on a pedestrian crossing sign indicate?
A pedestrian is crossing
Source: Idaho Driver's Handbook (July 2026), page 51 · Open this page in the manual (Manual page 51)
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
Source: Idaho Driver's Handbook (July 2026), page 52 · Open this page in the manual (Manual page 52)
Where is the Share the Road sign used?
On highways where bike lanes are not provided
Source: Idaho Driver's Handbook (July 2026), page 52 · Open this page in the manual (Manual page 52)
Where may Share the Road signs be placed?
Where lanes are narrow or traffic volumes or speeds are high
Source: Idaho Driver's Handbook (July 2026), page 52 · Open this page in the manual (Manual page 52)
What does the Animal Crossing warning sign, such as a leaping deer, tell drivers to do?
Watch for animals crossing the highway
Source: Idaho Driver's Handbook (July 2026), page 53 · Open this page in the manual (Manual page 53)
Why is the Emergency Notification System sign posted at or near a railroad crossing?
It shows how to notify the railroad of an emergency or a malfunction
Source: Idaho Driver's Handbook (July 2026), page 53 · Open this page in the manual (Manual page 53)
What does the yellow light on a doghouse signal indicate?
That the protected left turn movement is ending
Source: Idaho Driver's Handbook (July 2026), page 56 · Open this page in the manual (Manual page 56)
How should you treat an intersection where the traffic signal is not functioning?
As a four-way stop
Source: Idaho Driver's Handbook (July 2026), page 56 · Open this page in the manual (Manual page 56)
What must you do when a pedestrian hybrid beacon shows two solid red lights?
Stop at the stop line and stay stopped completely
Source: Idaho Driver's Handbook (July 2026), page 57 · Open this page in the manual (Manual page 57)
What must a driver do when the red lights of a pedestrian hybrid beacon flash alternately?
Stop, yield to pedestrians in the crosswalk, and go when it is clear
Source: Idaho Driver's Handbook (July 2026), page 57 · Open this page in the manual (Manual page 57)
Why may ice form sooner and stay longer on bridges and overpasses?
Their undersides are exposed and they lack ground warmth
Source: Idaho Driver's Handbook (July 2026), page 113 · Open this page in the manual (Manual page 113)