Which type of information is NOT typically needed for crash investigations?

The correct answer is that weather conditions are not typically needed for crash investigations. While weather conditions can play a role in analyzing the circumstances of a crash, they are not always essential information for every case. Investigators primarily focus on aspects that directly relate to the mechanics of the collision itself, such as identification of the vehicles and their drivers, descriptions of the accident scene, and any effects the crash had on involved components.

Identification refers to establishing who the parties involved in the crash are, which is crucial for accountability and further investigation. Description focuses on what happened during the crash, including the sequence of events and the positions of the vehicles post-collision. Additionally, understanding the effects on the components is important for determining how the crash occurred and assessing damages.

While weather can influence driver behavior and road conditions, it is generally secondary information that serves to support primary evidence rather than being an essential aspect of the investigative process.