This series of lessons contains animations and simulations designed to teach police officers how to estimate a vehicle’s speed from four different types of skid marks.

Each lesson begins with a tutorial and a 3D movie showing a collision and the type of skid mark it produces. A second movie shows how the police officer should measure and record the length of the skid mark.

Next, a simulation lets the learner explore the effect of different road conditions by generating skid marks for the learner to measure, record and estimate the vehicle’s speed.

The final module in each lesson provides police officers with a math tool to apply the appropriate formula to estimate a vehicle’s speed from skid marks.

These materials were produced for the Justice Knowledge Network, a five-year research and development project to develop e-learning for Canadian police forces.