Warning and construction signs

Key points

1. Follow police, school crossing guards and other workers even when their directions differ from the light or sign.

   Source: Handbook p. 22

   “You must follow their directions even if they are different from the traffic light or sign on the road.”
   Wisconsin Motorists' Handbook, Handbook p. 22

2. Warning signs are yellow with black lettering or symbols, and most are diamond shaped.

   Source: Handbook p. 22

   “These signs are yellow with black lettering or symbols. Most are diamond shaped. They warn you about a special situation or that a hazard is ahead.”
   Wisconsin Motorists' Handbook, Handbook p. 22

3. Signal Ahead means stop lights are ahead, so be ready to slow down and stop.

   Source: Handbook p. 22

   “Signal Ahead Stop lights are ahead. Be ready to slow down and stop.”
   Wisconsin Motorists' Handbook, Handbook p. 22

4. The 2 Way Traffic sign means you are leaving a one way road and entering one with opposing traffic.

   Source: Handbook p. 23

   “2-Way Traffic You will see this sign when you are leaving a one-way roadway and entering a roadway with opposing traffic.”
   Wisconsin Motorists' Handbook, Handbook p. 23

5. Stop Ahead means a stop sign is ahead, so slow down to stop safely.

   Source: Handbook p. 23

   “Stop Ahead There is a stop sign ahead. Slow down so that you can safely stop.”
   Wisconsin Motorists' Handbook, Handbook p. 23

6. On a pedestrian crossing sign, the arrow below shows where the crossing is. Yield to crossing pedestrians.

   Source: Handbook p. 23

   “This arrow indicates where the crossing is. Yield to crossing pedestrians.”
   Wisconsin Motorists' Handbook, Handbook p. 23

7. Construction signs are orange diamonds or rectangles and warn of people working on or near the road.

   Source: Handbook p. 26

   “They are an orange diamond or rectangle. The lettering and symbols are black. These signs warn you about people working on or near the road.”
   Wisconsin Motorists' Handbook, Handbook p. 26

8. Traffic fines double in work areas, and you may use a phone there only to report an emergency.

   Source: Handbook p. 26

   “Traffic fines double in these areas. You can only use your cellphone in a construction zone if you are reporting an emergency.”
   Wisconsin Motorists' Handbook, Handbook p. 26

9. At a flagger, you must follow the worker's directions.

   Source: Handbook p. 26

   “Road Construction Flagger Ahead A worker with a sign or a flag. You must follow their directions.”
   Wisconsin Motorists' Handbook, Handbook p. 26

Numbers to know

Recognize these signs

3 questions from the Wisconsin practice test

1. 1. What is the purpose of Wisconsin warning signs?

   1. To authorize parking in any nearby lane
   2. To list the driver's license renewal date
   3. To identify only services such as hospitals
   4. To alert drivers to a special situation or hazard ahead
   Show answer

   To alert drivers to a special situation or hazard ahead. Warning signs communicate that a special situation or hazard is ahead. They help a driver prepare by scanning the roadway, reducing speed, or anticipating another road user. License dates belong to administrative documents, and service signs guide drivers toward facilities rather than warn about general hazards. No warning sign grants permission to park in a travel lane. The handbook describes these signs as commonly yellow and diamond shaped, so their visual presence should prompt an early safety adjustment.

2. 2. What does a Wisconsin Signal Ahead sign warn a driver about?

   1. A railroad crossing is immediately behind the sign
   2. Stop lights are ahead, so be ready to slow and stop
   3. The road becomes one-way with no signal
   4. A lane ends and must be changed immediately
   Show answer

   Stop lights are ahead, so be ready to slow and stop. A Signal Ahead sign warns that stop lights are coming and tells the driver to prepare for slowing or stopping. It does not identify a railroad crossing, declare that the road becomes one-way, or force an immediate lane change. The warning is advance information, so scan for the signal, manage speed early, and be prepared to stop at the intersection. Treat the sign as a prompt to look farther ahead, not as permission to accelerate before the light appears.

3. 3. What special rule applies to traffic fines in construction areas?

   1. Fines double only after sunset
   2. Traffic fines are waived when workers are present
   3. Only parking fines double there
   4. Traffic fines double in these areas
   Show answer

   Traffic fines double in these areas. Wisconsin warns that traffic fines double in construction areas. The rule is not limited to parking, nighttime, or a waiver for active workers. Orange signs, cones, and flags signal a work area where you should slow down and watch for people, shifted lanes, and changing instructions. The safest response is to reduce speed early, obey the flagger, and leave room for workers and equipment.

Source: the Wisconsin Motorists' Handbook, Section 4: Signs. This lesson is a plain English summary, not the law itself; where it differs, the manual and the statute govern. Last checked 2026-09-27.