Warning signs in Illinois
The Illinois Rules of the Road shows or names everything on this page: 37 in all, on pages 64, 66, 68–72.
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Blank Yellow Pentagon
This five-sided sign is yellow or yellow-green with black symbols. It means either SCHOOL ZONE or SCHOOL CROSSING. If the sign shows two children walking, a school is nearby. If the sign shows two children walking with a downward pointing arrow, you are at a school crossing.
Manual page 64
Speed Zone Ahead
This sign warns you that there is a speed zone ahead. Be prepared to alter your current speed.
Manual page 66
Pedestrian Crosswalk
This sign tells you there is a crosswalk. Crosswalks are not always located at intersections, so you must watch both sides of the street for pedestrians. Pedestrian crosswalk signs may also be accompanied by a yellow flashing beacon located on the sign.
Manual page 68
Pedestrian Crosswalk (fluorescent, arrow plaque)
This sign tells you there is a crosswalk. Crosswalks are not always located at intersections, so you must watch both sides of the street for pedestrians.
Manual page 68
Truck Symbol
These signs alert drivers in advance of special areas where vehicles and pedestrians may be crossing.
Manual page 69
Bicycle
These signs alert drivers in advance of special areas where vehicles and pedestrians may be crossing.
Manual page 69
Wheelchair User Symbol
These signs alert drivers in advance of special areas where vehicles and pedestrians may be crossing.
Manual page 69
Snowmobile Symbol
These signs alert drivers in advance of special areas where vehicles and pedestrians may be crossing. [p47: Use caution when driving in areas with snowmobile warning signs.]
Manual page 69
School Sign
These signs warn you of school areas and crossings. ... The first two signs warn of school crossings ahead or of school buildings or grounds next to the roadway.
Manual page 69
School Sign with AHEAD Plaque
The first two signs warn of school crossings ahead or of school buildings or grounds next to the roadway.
Manual page 69
School Sign with Arrow Plaque
The last two signs are posted at school crosswalks. [p64: If the sign shows two children walking with a downward pointing arrow, you are at a school crossing.]
Manual page 69
School Crossing
The last two signs are posted at school crosswalks.
Manual page 69
Stop Ahead
These signs warn you of approaching traffic control signals. Although the traffic signal may not yet be visible, the traffic signs are close enough to require you to start slowing down.
Manual page 69
Yield Ahead
These signs warn you of approaching traffic control signals. Although the traffic signal may not yet be visible, the traffic signs are close enough to require you to start slowing down.
Manual page 69
Signal Ahead
These signs warn you of approaching traffic control signals. Although the traffic signal may not yet be visible, the traffic signs are close enough to require you to start slowing down.
Manual page 69
Crossroad
These four signs warn you of intersections ahead where traffic may exist or a right or left turn may be required. A sign naming the intersecting road also may be posted.
Manual page 70
Side Road
These four signs warn you of intersections ahead where traffic may exist or a right or left turn may be required.
Manual page 70
T Intersection
These four signs warn you of intersections ahead where traffic may exist or a right or left turn may be required.
Manual page 70
Y Intersection
These four signs warn you of intersections ahead where traffic may exist or a right or left turn may be required.
Manual page 70
Right and Left Turns Coming
Certain signs are posted before turns and curves. The shape of the arrow tells you what to expect.
Manual page 70
Road Curves to the Right and Left
Certain signs are posted before turns and curves. The shape of the arrow tells you what to expect.
Manual page 70
Road Curves to the Right
Certain signs are posted before turns and curves. The shape of the arrow tells you what to expect.
Manual page 70
Right Turn Ahead
Certain signs are posted before turns and curves. The shape of the arrow tells you what to expect.
Manual page 70
Winding Road Ahead
Certain signs are posted before turns and curves. The shape of the arrow tells you what to expect.
Manual page 70
Maximum Safe Speed Plate
A small sign showing the maximum safe speed may also be posted below the arrow.
Manual page 70
Exit Ramp Speed
These signs are posted at freeway and interstate exit ramps. This sign shows the maximum safe speed at which a vehicle can be driven on the ramp.
Manual page 70
Slippery Pavement
All roads are slippery and dangerous when wet. This sign warns you of conditions that can cause you to lose control of your car. Slow down when coming upon wet pavement because it takes longer to stop.
Manual page 70
Downgrade
This sign warns you of a dangerous hill. It may be very long or steep, or have sharp curves. Slow your speed before starting down the hill.
Manual page 71
NARROW BRIDGE
This sign warns you that an approaching bridge has a narrow roadway. A bridge width is generally 2 feet less than the width of the approach pavement.
Manual page 71
Reduction in Lanes
These signs are used on multi-lane highways to warn you of a reduction in the number of traffic lanes in the direction of travel. ... Be prepared to change lanes or to allow other vehicles to merge into your lane.
Manual page 71
Reduction in Lanes (lane line shown)
These signs are used on multi-lane highways to warn you of a reduction in the number of traffic lanes in the direction of travel.
Manual page 71
ROAD NARROWS
This sign warns you that a two-lane road suddenly narrows.
Manual page 71
Merging Lanes
This sign tells you that two lanes of traffic going the same direction will soon merge into one lane. Be ready to either change lanes or allow other traffic to merge into your lane. Merge signs may appear on expressways just before expressway ramps. The driver on the expressway should slow down to let the driver on the ramp merge.
Manual page 72
Change in Direction
This sign warns you of a change in direction or narrowing of the road. You may find several of these signs on the outside of a sharp curve or on approaches to a narrow bridge.
Manual page 72
Divided Highway Begins
The first sign is posted before a divided highway begins.
Manual page 72
Divided Highway Ends
The second sign is posted just before the divided highway ends. Be careful nearing the end of a divided highway.
Manual page 72
Two-Way Roadway
This sign informs you that you are leaving a divided roadway and approaching a two-way highway.
Manual page 72