An in-depth investigation should include:
- Position of the vehicles on the roadway at various points of time
- Analyzing the links in the chain of events
- Determining speed of the vehicles
- Direction of travel
- Accident avoidability
- Calculating time, speed, and distance relationships
- Analyzing driver actions or inaction
- Plotting vehicles at first contact, maximum engagement, and disengagement
- Calculation severity of collision metrics
- Driving strategy and tactics
- Evaluating whether traffic law violations were a factor to the cause of an accident
- Who was driving?
- Evaluating contributing factors
- Lines of sight and visibility factors
- Effect of weather and road conditions
- Effect of alcohol and other psychophysical considerations
- Lines of sight and visibility factors