The 52 road signs, signals and markings the Illinois Rules of the Road 2026 (DSD A 112) teaches, each drawn as it looks on the road, with what it means.
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Red signs stop you or forbid something. White signs state a law you must obey.
Yield to trains. This is the rail equivalent of a yield sign.
White X-shaped sign at the crossing itself. A plate below shows the number of tracks.
You may not drive past this point in this direction.
White square with a red circle and a white bar across it.
Overtaking is prohibited from here until a PASS WITH CARE sign or the marking changes.
Black-on-white regulatory rectangle.
Pass this island, median or barrier on the right.
Black-and-white arrow sign on an obstruction.
Bicycles are prohibited on this road or path.
Bicycle symbol in a red circle-slash.
No left turn from this point, in this direction.
Left arrow in a red circle-slash.
No right turn here, red light or green.
Right arrow in a red circle-slash.
The usual permission to turn on red is cancelled here.
White regulatory sign, often with a red circle-slash.
You may not reverse direction here.
Black U-arrow in a red circle-slash.
Traffic moves only in the arrow's direction.
Black-and-white horizontal arrow rectangle.
Maximum legal speed on this freeway in good conditions.
Come to a complete stop. Wheels must stop rolling.
Red octagon — the only octagon on the road. Recognizable from the back and in the dark.
This is the exact stopping point when the signal is red.
A regulatory sign that marks the stop line.
You are traveling against traffic. Get off the road immediately.
Red rectangle, white text.
Give way to traffic and pedestrians already there. Slow down, and stop if you must.
Red-and-white downward triangle — the only downward triangle.
Yellow diamond signs warn you about what is ahead.
A bike route or path crosses or joins the roadway here.
Yellow diamond with a bicycle symbol.
Same message as the yellow version, upgraded because the conflict is frequent or has caused crashes.
Fluorescent yellow-green diamond.
The road changes direction sharply right here.
Yellow rectangle with an arrowhead, mounted in the curve itself.
A road crosses yours ahead; traffic may enter from both sides.
Yellow diamond with a plus symbol.
A curve is ahead.
Yellow diamond with a curved arrow. A maximum safe speed may be posted below.
A median or barrier is about to separate the directions.
Yellow diamond, one road splitting around a median.
The median is ending — you are about to face oncoming traffic again.
Yellow diamond, two roads joining into one.
A person will direct traffic ahead.
Orange diamond with a person holding a flag or paddle.
Your lane is about to disappear. Move over before it does.
Yellow diamond showing one lane tapering away.
Another stream of traffic is about to join your lane.
Yellow diamond, two lines joining.
The bridge is narrower than the road you are on.
Yellow diamond with a pinched roadway.
You are entering a no-passing zone.
Yellow pennant — a sideways triangle. Mounted on the LEFT side of the road.
People cross here, often mid-block.
Yellow (or fluorescent yellow-green) diamond with a walking figure.
A railroad crossing is ahead. Shape alone identifies it.
Yellow CIRCLE with an X and RR — the only round sign on the road.
A work zone is ahead. Conditions differ from the permanent signs.
An orange diamond, usually for construction or maintenance.
A road joins from one side only.
Yellow diamond with a T-branch to one side.
A traffic light is coming, possibly hidden by a curve, crest or trees.
Yellow diamond with a traffic-signal symbol.
The surface loses grip in rain, frost or fog.
Yellow diamond with a car and skid marks.
A long or steep descent is ahead.
Yellow diamond with a truck on a slope, often with a percentage plate.
A stop sign is coming that you cannot see yet.
Yellow diamond with a small red octagon symbol.
Your road ends ahead at another road. You must turn.
Yellow diamond with a T symbol.
The one-way or divided section ends; oncoming traffic returns.
Yellow diamond, two opposing arrows.
A winding road is ahead.
Yellow diamond with an S-shaped arrow.
The five-sided shape is reserved for school.
School zone — children crossing.
Five-sided, in yellow or yellow-green, with black symbols.
This vehicle normally travels from 5 to 20 mph.
Orange-and-red reflective TRIANGLE mounted on the rear of a vehicle.
Follow a person directing traffic, even if the light shows something else.
You may turn the way the arrow points after you yield to pedestrians and vehicles in the intersection or crosswalk.
A flashing yellow arrow.
Go the way the arrow points only after you yield to traffic in the intersection or crosswalk.
Green arrow lens.
Whether that specific lane is open in your direction right now.
Green arrow (open) or red X (closed) above a lane.
Controls people on foot — and tells you what pedestrians are about to do.
WALK figure / raised HAND, often with a countdown.
You may proceed if the intersection is clear.
The green lens is at the bottom, or on the right when the lenses are side by side.
Stop. Do not go straight until the light is green and the intersection is clear. After a full stop, you may turn right on red unless a sign forbids it.
The red lens is at the top, or on the left when the lenses are side by side.
The yellow light warns that the signal is changing from green to red.
A yellow lens in the center of the signal.
When a sign and the paint disagree, follow the sign. The paint still shows where you may drive.
This lane may only be used for the movement shown.
White arrow painted in the lane, sometimes with the word ONLY.
The solid white line across your lane that shows where to stop.
Green, blue and brown signs show directions, services and places of interest.
The normal route is closed; follow this alternate.
Orange rectangle reading DETOUR — often paired with an arrow panel showing the routing.
Directions, distances and exits. Green never imposes a duty.
Green rectangle, white lettering.
Facilities ahead — restrooms, parking, sometimes fuel and food.
Blue sign with white letters and a white border.
From the Illinois Rules of the Road 2026 (DSD A 112)
Edition: 2026, DSD A 112.47, printed July 2026. We read it on October 23. Read it at the SOS. We're an independent study app and aren't connected to the SOS or any state agency. Rules change, so check anything that matters to you with the SOS.
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