How many types of reference points are there?

There are two main types of reference points in the context of traffic crash investigations: fixed reference points and variable reference points. Fixed reference points are established, consistent locations, such as permanent structures or landmarks, that can be used to measure and assess the scene of a crash. Variable reference points are determined based on the specific circumstances of a particular crash scene, which may include the positions of vehicles and debris.

Understanding these two categories is fundamental for investigators when documenting the positioning of vehicles and other elements involved in a traffic incident. This classification helps ensure accuracy in measurements and the reconstruction of the events leading to the crash, providing significant value in establishing clear narratives during investigations.