U.S. Road Signs – Most Difficult Signs on Your Permit Test

This sign warns you of a horizontal alignment (curve) in combination with an intersection side road (intersection)

This sign tells you that there is a flag-person ahead to control traffic. Slow down and be prepared to stop.

Two-way left turn only. The center lane is shared for left turns in both directions of travel.

This sign warns you of a railroad crossing before you come to the T-intersection ahead.

The diagonal stripes on the barricade or vertical panel guide the driver towards the direction to where the traffic is to pass. Stripes slowing downward to the left means the driver should bear to the left.

Lane Use Control. Your lane is splitting off into two separate directions. You can turn left or go straight through.

This is a regulatory sign, indicating you must keep right. At locations where it is not readily apparent that traffic is required to keep to the right, this sign tells you to pass only to the right-hand side of a roadway feature or obstruction. It is often placed at raised medians, parkways, islands, and underpass piers. The sign can be reversed (Keep Left).

The pass-with-care sign indicates the end of the no-passing zone. When you have passed this sign, you are again allowed to pass other vehicles with care.

This is an Advisory Speed sign. These cautionary signs show the recommended safe speed around curves, corners, and off-ramps.

Narrow bridge. The bridge is wide enough to accommodate two lanes of traffic, but with little clearance.

Reverse turn. This sign tells you there two sharp turns ahead (one to the left and then a sharp turn to the right). Reduce speed.

Low Clearance. You are approaching a low bridge or underpass. Do not enter if your vehicle or cargo exceeds the maximum height indicated on the sign.

Divided highway ahead. The highway ahead is divided into two one-way roadways. Divided highways have a center strip that separates traffic going in opposite directions. The first sign is posted before a divided highway begins.

Two-way Traffic. This sign tells you that you are leaving a divided roadway and will be driving on a two-way highway. The sign may also be posted along such a roadway to remind you of oncoming traffic in the left lane.

Double Arrow. Traffic is permitted to pass on either side of an island, obstruction, or gore in the roadway. Traffic separated by this sign may either rejoin or change directions.

The One-Direction Large Arrow sign is used either as a supplement or alternative to the Chevron signs. It can also be used to supplement a Turn or Reverse Turn sign. The sign is not used in roundabouts, at the beginnings and ends of medians or at center piers.

The road surface changes ahead from a hard-surfaced pavement to a low-type surface or earth road.

Added lane sign. Two roadways come together, but you are not required to merge. An additional lane begins. The added lane sign is normally visible from both roadways. There could also be a sign placed on the side of each roadway.

Stop sign ahead. When you come to this sign, slow down to be ready to stop at the stop sign.

While most warning signs are yellow, some Illinois communities may have fluorescent yellow-green pedestrian and school signs