What Evidence Is Needed to Prove Another Motorist’s Negligence in a Collision at a Traffic Signal or Exit in Wisconsin?

The information on this site is for general informational purposes only, may be outdated, and is not legal advice; do not rely on it without consulting your own attorney. See full disclaimer.

Disclaimer: This article is for educational purposes and is not legal advice.

Detailed Answer

Under Wisconsin law, all drivers owe a duty of care to obey traffic control devices and signal laws. You must show four elements: duty, breach, causation, and damages. Common statutes include Wis. Stat. § 346.18 (traffic control signals) and Wis. Stat. § 346.13 (stop and yield signs). Once breach and causation are established, Wis. Stat. § 895.045 outlines comparative fault rules.

Key evidence types:

  • Police Reports: Official crash diagrams, witness statements, traffic law violations cited by the officer.
  • Photographs & Video: Images of vehicle damage, skid marks, traffic signals, intersection layout. Red‐light camera or traffic cam footage can verify signal status at impact.
  • Event Data Recorders (Black Boxes): Speed, braking, and throttle data recorded moments before crash.
  • Eyewitness Testimony: Statements from passengers, nearby drivers, or pedestrians who saw the signal phase and vehicle actions.
  • Accident Reconstruction: Expert analysis of skid‐mark measurements and vehicle positions to demonstrate fault.
  • Signal Maintenance Records: Proof of proper signal timing and maintenance to rebut claims of signal malfunction.

Gathering this evidence helps prove the other driver ran a red light, failed to yield on exit, or otherwise breached their duty. Then, link that breach directly to your collision and damages. Remember, Wisconsin applies a comparative fault system. If you share fault, your recovery may reduce proportionally under Wis. Stat. § 895.045.

Helpful Hints

  • Preserve all photos and videos immediately after the crash.
  • Obtain the police report early; it may be crucial for insurance claims.
  • Identify and record witness contact details before they leave the scene.
  • Request signal camera footage from the municipality or state DOT.
  • Consult a qualified accident reconstructionist for complex cases.
  • Keep detailed records of medical treatments and property repairs.

The information on this site is for general informational purposes only, may be outdated, and is not legal advice; do not rely on it without consulting your own attorney. See full disclaimer.