Highway Signs: Obeying Officers and Crossing Guards, Warning Signs From Intersection to School Crossing, Regulatory Signs Including Lane-Use, School Speed, Slow-Moving Vehicle, No Passing Zone and Reserved Parking, Construction Signs and Doubled Fines, Destination, Exit and Roundabout Exit Signs, Service Signs, Mile Markers, County, US, State and Interstate Route Shields, and Railroad Crossing Signs, Gates and Lights

Written for aiforu2 as the source for a practice-test bank and the on-device tutor for the Wisconsin knowledge test. The facts follow the official manual; the wording is ours.

Source: Wisconsin Motorists' Handbook (WisDOT DMV, BDS126, 2026 edition), Section 4 "Signs" (pages 22–31).

People directing traffic

Police officers, school crossing guards and road workers sometimes direct traffic, and you must follow them even when their directions differ from the signal or sign.

Warning signs

Warning signs are yellow with black lettering or symbols and mostly diamond shaped; they tell you a special situation or hazard is ahead. Intersection / Cross Road marks where roads cross. Divided Highway means the two directions are about to be separated by a physical barrier such as a guardrail. Slippery When Wet tells you to slow down. Signal Ahead means a traffic light is coming; be ready to stop. Deer Crossing marks an area where deer often cross. Sharp Turn (left or right arrow) means slow down for the turn. Lane Ends (right or left) means move to the other lane when safe. Merge (right or left) means move over into the next lane when safe. Hill warns of a grade ahead. 2-Way Traffic appears where a one-way road becomes a road with opposing traffic. Curved Road means a gradual bend. Stop Ahead shows an arrow above a stop-sign shape: slow down to stop safely. Roundabout Ahead shows a counterclockwise symbol with a plaque. Pedestrian Crossing shows a walker with an arrow plaque pointing to the crossing; yield to people crossing. School Crossing / School Zone, which may be fluorescent yellow-green or yellow, marks school crossings; yield to crossing children.

Regulatory signs

Regulatory signs are square, rectangular or a special shape, white or red with black, red, white or green lettering, and state the rules. No Turn points to the direction you may not turn. No U-turn bans U-turns. Do Not Enter is posted at wrong-way exit ramps and one-way streets. Speed Limit gives the maximum in good conditions. Reduced Speed Ahead warns you to slow for a curve or slippery road. School Speed Limit 15 When Children Are Present caps your speed whenever children are visible. Keep Right means a traffic island or obstacle divides the road ahead. Lane-use signs show which movements each lane may make: in one example only the left lane may turn left or make a U-turn while the right lane goes straight or right; in a three-lane example the left lane goes left or straight, the middle straight, the right lane right; in another the left lane is left-turn only and the right lane turns left or goes straight. Stop is the eight-sided red sign with white letters: stop completely and wait until your path is clear. Slow Moving Vehicle is an orange reflective triangle on a vehicle that may travel 25 mph or less. Yield is the downward-pointing red and white triangle: give the right-of-way to other vehicles. No Passing Zone is the yellow pennant with black letters: no passing at all in that zone. Reserved Parking spaces are only for vehicles with a valid disabled parking permit or disabled license plate.

Construction signs

Construction, maintenance and emergency-worker signs are orange diamonds or rectangles with black lettering, along with orange cones and flags; they are your signal to slow down. Traffic fines double in these areas, and a cell phone may be used in a construction zone only to report an emergency. Road Workers Ahead means slow down or move over; Flagger Ahead means a worker with a sign or flag whose directions you must follow; Road Work Ahead may state the distance, such as 1000 feet or 1 mile. Tailgating is a leading cause of work-zone crashes, so keep your distance and be patient.

Destination, service and mile marker signs

Destination signs are square or rectangular, green or brown with white lettering, and give directions and distances to cities, states, airports, parks, historic areas and museums. A destination sign might show Madison reached by taking Interstate 94 west; an Exit sign's arrow shows which side the exit is on; a roundabout exit sign shows which road each exit puts you on; street name signs sit on a silver pole at almost every corner, facing the road they name; brown signs point to scenic or recreational places, sometimes with mileage. Service signs are square or rectangular, blue with white symbols, for services such as camping or a hospital; disabled-access signs may be white with green lettering on blue. Mile markers (reference markers) are tall, thin blue or green signs with white lettering placed every one- to two-tenths of a mile on the right or in the median; each shows the direction of travel, route number and mile, and they speed emergency response.

Route signs

The shape and color of a route sign tell you the kind of road. A county road sign is a white rectangle with rounded corners and black letters; a US route sign is a grey or white badge shape with black numbers; a Wisconsin state road sign is white with black numbers in a shape like a milk jug with a spout at the bottom; an Interstate sign is a shield, red on top and blue below, with white numbers.

Railroad crossings

Never try to beat a train, never stop on the tracks, do not cross unless there is room on the other side, do not shift gears while crossing, and look both ways before crossing even when no lights are flashing; trains are big, heavy and faster than they look. A round yellow sign with an X gives advance warning. The white X-shaped crossbuck reading Railroad Crossing marks the crossing itself, with a plaque below giving the number of tracks and often a Yield sign beneath it: you must yield to trains. Where lights are installed they flash when a train approaches from either direction; wait until they stop and the track is clear. A gate lowers when a train comes; never drive around it or under one that is moving, and where a bell or horn sounds, do not cross until it stops. A Tracks Out-of-Service sign means the tracks are no longer used, and an Exempt sign means certain vehicles need not stop. Crossings with more than one track may post the number, but not all do, so check for a second track, and at double tracks wait until the train is far enough away to see both tracks are clear. A blue sign at every crossing gives a phone number for reporting a stuck vehicle or a broken warning light.

Practise this with Wisconsin Driver License questions

More of this guide