Warning signs — Idaho Permit Test

This sign means there is another road ahead which crosses the one you are on, so watch carefully for cross-traffic in your path.

A car coming across your path arrives from the side, where a driver looking straight ahead will not find it.

There is another road ahead which crosses the road you are on

This sign is used on roads with higher speeds or where the view of the intersection is blocked, so be ready for an intersection and a stop light.

At speed there is not enough road left to stop once the signal itself comes into view.

These signs are used on roads with higher speeds or where the view of the intersection or light is blocked

If you are on the main road and see this sign, be prepared for other cars and trucks entering into your lane.

Traffic joining from a ramp is looking for a gap, and the gap they pick may be the one you are in.

If you are on the main road and see this sign, be prepared for other cars and trucks entering into your lane

This sign warns about a transition from a multi-lane divided highway to a two-lane, two-way section of highway.

Until now nothing was coming the other way. Past this sign something is, in the lane beside you.

This sign warns about a transition from a multi-lane divided highway to a two-lane, two-way section of highway

This sign means two lanes of traffic will soon become one, and merging traffic must yield.

Two drivers arriving at the same piece of road need one of them to yield, and the rule says which.

Two lanes of traffic will soon become one lane of traffic. Merging traffic must yield

This sign means you are nearing a school area with a crossing, so watch for children and the marked school crossing.

Children cross where the crossing is and also where it is not, which is why the whole area is marked rather than one point.

You are nearing a school area with a crossing. Watch for children and the marked school crossing

There are increased penalties for violating school zone speed limits.

The limit is low because a child stepping out has no distance to give, and the penalty is set to match.

There are increased penalties for violation of school zone speed limits

This sign means watch out for people crossing the road; pedestrians have the right-of-way and you may have to stop for them.

Somebody already in the road has nowhere to go, and the car is the only thing in the situation that can stop.

Pedestrians have the right-of-way, and you may have to stop for them

This sign may carry flashing lights that indicate a pedestrian is crossing.

The lights turn a fixed warning into a live one, so they mean somebody is in the road now.

The sign may have flashing lights that indicate a pedestrian is crossing

This sign means you are getting close to the place where two-way traffic will be divided by a center strip.

The strip changes which side of the road is yours, and taking the wrong one puts you against the flow.

You are getting close to the place where two-way traffic will be divided by a center strip

This sign means the two-way traffic ahead will no longer be divided by a center strip, so watch out for oncoming cars.

For the last few miles nothing was coming toward you. Past this sign something is.

Two-way traffic ahead will no longer be divided by a center strip. Watch out for oncoming cars

This sign gives early warning of a railroad crossing ahead, so be prepared to stop before you get to the tracks if a train is approaching.

A train cannot stop for a car, so the whole of the stopping has to be done by the driver, early.

This sign gives you early warning of a railroad crossing(s) ahead

This sign means the road ahead may become slippery in wet weather, so slow down in those conditions.

The surface is the same in the dry. It is the rain that turns this stretch into the one you cannot steer on.

Road ahead may become slippery in wet weather. Slow down under these conditions

This sign warns all vehicles that the road goes down a steep hill, and you should check your brakes before going down it.

Brakes fade on a long descent. Finding that out halfway down leaves nothing to do about it.

This sign is a warning to all vehicles that the road goes down a steep hill. You should check your brakes before going down the hill

This sign warns you of a no passing zone for your lane of traffic, and it is placed on the left-hand side of the road in addition to a DO NOT PASS sign or pavement markings.

It sits on the left because that is where a driver is looking when they are thinking about pulling out.

It warns you of a no passing zone for your lane of traffic

This sign is used on highways where bike lanes are not provided, and warns drivers and bicyclists that they need to share the highway.

Without a lane of their own, a cyclist is in the traffic lane by right rather than by accident.

is used on highways where bike lanes are not provided

This sign may be placed where there are narrow lanes, narrow shoulders, high traffic volumes or high speeds.

Those are the places where there is no room to pass, and where passing anyway is how a cyclist gets hit.

The signs may be placed where there are narrow lanes, narrow shoulders, high traffic volumes or speeds

This sign means watch for animals crossing the highway.

An animal in the road has no sense of a car's speed, and swerving for one is how drivers leave the road.

Watch for animals crossing the highway

This is the most common sign seen when approaching a roundabout.

It is the last warning before a place where the rule about who goes first changes completely.

The most common sign seen when approaching a roundabout is a warning sign with an arrow in a circle pattern

This sign can be found at most railroad crossings.

It marks the crossing itself rather than warning of one ahead, so where it stands the tracks are right there.

Railroad cross buck signs can be found at most crossings

What does this sign warn a driver about?

A road ahead that crosses the one being traveled. A car coming across your path arrives from the side, where a driver looking straight ahead will not find it. July 2026 Idaho Driver's Handbook, p.49: “There is another road ahead which crosses the road you are on”