Every US road sign follows two secret codes: a color code and a shape code. Learn the two codes once and you can understand a sign from its outline alone, at night, at speed, even covered in snow. Here is the whole system.
Color is the first thing your eye catches, long before words. Eight colors, eight meanings, never broken.
Stop. Do not. Prohibition. Red is the road saying no.
Red = a closed doorA law. Speed limits, turn rules, lane rules. Breaking a white sign is a ticket.
White = the rulebookWarning. The road ahead is about to change: a curve, a merge, a crossing.
Yellow = heads upWork zone. People and machines are on the road. Fines usually double here.
Orange = people workingDirection. Exits, distances, place names. Green signs guide you, they never warn you.
Green = go this wayServices for drivers. Gas, food, lodging, hospitals, rest areas.
Blue = help for youRecreation. Parks, campgrounds, historic places. The scenic world.
Brown = nature and historySchool zones and pedestrian crossings. The brightest color on the road guards the most fragile people.
Glow = children nearShapes work even when you cannot see the color: from behind, in glare, in a snowstorm. Two shapes are so important they are never used for anything else.
Stop, and nothing else. Eight sides belong to exactly one sign in America.
8 sides = 1 meaningYield. Slow down and let others go first. The point-down triangle is only ever yield.
Tip down = bow downNo passing zone. It stands on the LEFT of the road and points at the exact spot the zone begins.
The flag points at the zoneSchool zone. The five-sided house shape means children are crossing near here.
House shape = school houseRailroad crossing ahead. Start looking and listening for a train now, not at the tracks.
Round = wheels = trainWarning. Whatever is inside the diamond is what the road is about to do.
Diamond = drama aheadA rule in force right now: speed limits, turn restrictions, lane use.
Tall = the lawGuidance: where you are, where the exit goes, how far the city is.
Wide = the map talkingThese pairs cost more test points than any other signs. Learn the difference once and keep the points.
DO NOT ENTER guards the door. It stands at the mouth of the road, telling you not to drive in. WRONG WAY comes after the mistake. If you see it, you are already driving against traffic: pull over safely and turn around. On the test: the red circle with the white bar always means do not drive onto that road.
Both are triangles, and that is where the similarity ends. Point DOWN and red: yield, let others go first. Point SIDEWAYS and yellow: no passing zone is starting. The pennant is the only sign on the road shaped like a flag, and it always stands on the left side, pointing at the zone it announces.
Same shape, different world. Yellow warns about the road itself: a curve, a signal ahead, a crossing that is always there. Orange warns about people: a temporary work zone with workers and machines on the road. Slow down for both, but in orange, expect doubled fines and sudden stops.
These are real practice questions from our verified bank, word for word. Tap an answer.
1.A steady red traffic light means:
A steady red light means you must come to a complete stop and wait until the light turns green before moving.
2.When all the traffic lights at an intersection are dark because of a power failure, you should treat the intersection as:
If the signals are completely dark, treat the intersection as an all-way stop. Every driver must stop and take turns.
3.Warning signs that are shaped like a pennant (a long horizontal triangle) tell you:
The pennant-shaped sign points to the start of a no-passing zone. It sits on the left side of the road to warn drivers.
4.At a four-way stop where two cars arrive at the same time, who has the right-of-way?
When two vehicles reach a four-way stop at the same time, the driver on the right goes first.
You answered 0 of 4 correctly. There are 1,432 more where these came from, in your language.
You can now read a sign from its color and shape alone. The next lesson teaches the lights that run every intersection.
Prefer to study on your phone, in your own language? The same questions live in the app — 19 languages, all 50 states, every answer explained.