# Crash Scene Analysis (CSR 103)

This course is intended to discuss how the process of perception and reaction affects collision reconstructions and how one can calculate the speed of a vehicle at the point in which it launched off the roadway.

This course consists of two (2) video lessons, including an assessment at the conclusion of each segment.

Credit: 2 hrs

**Time and Distance Analysis**

**This Lesson Purpose:** This lesson is intended to discuss how the process of perception and reaction affects collision reconstructions. Perception and reaction times and distance calculations are discussed and performed.

**Training Objectives:** At the end of this lesson, the student will be able to achieve the following objectives in accordance with the information received in class:

1. Demonstrate knowledge of the basic concept of Perception and Reaction as it relates to crash scene reconstruction.

2. Using the Basic Speed Equation, determine the amount of time it takes for a vehicle to cover the distance during a collision.

3. Understand how to calculate elapsed time while a vehicle slides to a complete stop.

4. Understand how to calculate perception and reaction times, distances and speeds.

Video Length: 00:15:56

**Vehicle Launch Analysis**

**Lesson Purpose:** This lesson is intended to discuss how the process of determining a vehicle speed at the point it launches off a roadway. Velocity calculations from free-fall analysis are also discussed and performed.

**Training Objectives: **At the end of this lesson, the student will be able to achieve the following objectives in accordance with the information received in class:

1. Understand how to complete a scaled diagram to accurately depict the collision scene.

2. Understand the required data to collect when analyzing a vehicle launch scenario.

3. Understand basic principles for determining distance of a launch on a scaled diagram.

4. Understand how to calculate vehicle launch velocities for level and angled launches.

Video Length: 00:14:14