Every road sign on the US permit test
US road signs follow the federal Manual on Uniform Traffic Control Devices (MUTCD), which means a stop sign in Maine looks the same as a stop sign in Hawaii. Below is PermitPrep's catalog of 41 commonly tested signs grouped by category. Each entry includes the sign's shape, its color scheme, and a one-line meaning you can quote on the exam.
How signs are categorized
The MUTCD organizes signs by purpose, and the color and shape of a sign always reflect its category. Regulatory signs tell you what you must or must not do — they're typically white with black text, or red and white. Warning signs alert you to upcoming hazards — they're almost always yellow diamonds (or fluorescent yellow-green pentagons for school and pedestrian zones). Guide signs help you navigate — green for highway exits, blue for motorist services, brown for recreation. Construction signs are orange and apply only inside active work zones, where penalties for violations are typically doubled.
Regulatory signs
Stop Sign
Come to a complete stop at the marked stop line, crosswalk, or intersection. Yield the right-of-way to pedestrians and cross traffic before …
regulatoryYield Sign
Slow down and give the right-of-way to traffic on the intersecting road. Stop only if necessary to avoid a collision.…
regulatoryDo Not Enter
You may not enter the road, ramp, or driveway from this direction. Used to prevent wrong-way travel on one-way streets and highway exits.…
regulatoryWrong Way
You are traveling against the legal direction of traffic. Pull over safely, turn around, and re-enter the road in the correct direction.…
regulatoryOne Way
Traffic on the road moves only in the direction of the arrow. Do not turn against the arrow.…
regulatoryNo U-Turn
You may not make a U-turn at this location. Look for an intersection or driveway where U-turns are permitted.…
regulatoryNo Left Turn
Left turns are prohibited at the intersection. Continue straight or turn right where allowed.…
regulatoryNo Right Turn
Right turns are prohibited at this intersection or driveway.…
regulatorySpeed Limit
Maximum legal speed in ideal conditions. Drive slower in rain, fog, snow, or heavy traffic to keep control.…
regulatoryMinimum Speed Limit
You must travel at least the posted minimum speed unless conditions make it unsafe.…
regulatoryNo Passing Zone
You may not pass other vehicles while in this zone, even if it appears clear ahead. The pennant is posted on the left side of the road.…
regulatoryKeep Right
Stay to the right of a divider, median, or obstruction in the roadway.…
regulatoryKeep Left
Stay to the left of a divider or obstruction.…
regulatoryNo Parking
You may not park your vehicle here. Stopping briefly to load or unload may be allowed depending on additional plaques.…
regulatoryAccessible Parking
Parking reserved for vehicles displaying valid disability plates or placards.…
Warning signs
Curve Ahead
The road bends in the direction of the arrow. Reduce speed before the curve and avoid braking inside it.…
warningSharp Turn
A sharp 90-degree or tighter turn is ahead. Slow down significantly before entering.…
warningMerge
Two lanes of traffic combine into one. Adjust speed and position to merge smoothly.…
warningLane Ends
Your lane is ending. Move into the open lane in advance and yield to traffic already there.…
warningTwo-Way Traffic
A divided or one-way road is becoming a two-way road. Stay in the right lane.…
warningPedestrian Crossing
Pedestrians may be crossing the road. Slow down and be ready to stop.…
warningSchool Zone
You are entering a school zone. Reduced speed limits apply during posted hours and when children are present.…
warningSchool Crossing
Children may be crossing here on the way to school. Stop for any pedestrian in the crosswalk.…
warningDeer Crossing
Wildlife may enter the roadway, especially at dawn and dusk. Scan the shoulders.…
warningSlippery When Wet
Pavement may be slick during rain or snow. Reduce speed and avoid sudden braking or steering.…
warningBump
A raised section of pavement is ahead. Slow down to protect your suspension and stay in control.…
warningDip
A low place in the road is ahead. Slow down — water can collect during heavy rain.…
warningRailroad Crossing
A railroad crossing is ahead. Look, listen, and be ready to stop. Never try to outrun a train.…
warningStop Ahead
A stop sign is coming up. Begin slowing in advance, especially if visibility is limited.…
warningSignal Ahead
A traffic signal is ahead, often around a curve or hill. Be prepared to stop.…
warningLow Clearance
The bridge or overpass ahead has limited vertical clearance. Tall vehicles must find another route.…
warningNarrow Bridge
The bridge ahead is narrower than the road. Slow down and stay centered in your lane.…
Guide signs
Route Marker
Identifies the highway route number — Interstate (red, white, blue), US route (white shield), or state route.…
guideExit Sign
Identifies an upcoming highway exit, its number, and the destination it serves.…
guideMile Marker
Helps you measure distance and report your location to emergency services.…
guideRest Area
Indicates an upcoming rest area with parking, restrooms, and often picnic facilities.…
guideHospital
Directs drivers to a nearby hospital or emergency medical facility.…
Construction signs
Road Work Ahead
Workers and equipment are on or near the road ahead. Reduce speed and watch for flaggers.…
constructionFlagger Ahead
A flagger will direct traffic. Obey their signals — they have the same legal authority as a posted sign.…
constructionDetour
The normal route is closed. Follow the arrows to use the marked alternate route.…
constructionLane Closed Ahead
A travel lane is closed for work. Merge early into the open lane.…
Study tips
Permit exams love trick sign questions. Three patterns appear over and over: (1) "What does this color mean?" — memorize the eight MUTCD colors and what they signal. (2) "What is this shape?" — the octagon, downward triangle, and pennant are reserved for stop, yield, and no-passing-zone respectively. (3) "What should you do when you see this sign?" — treat warnings as advisories that prepare you to slow down, and treat regulatory signs as legal requirements with consequences if ignored.
For state-specific drills, head to your state page — every state's practice test includes road sign questions calibrated to that state's manual.