What is the preferred method of measurement in a traffic accident?

The preferred method of measurement in a traffic accident is triangulation. This technique allows for accurate location determination by measuring angles and distances from multiple reference points. In an accident investigation, triangulation is beneficial because it can effectively locate the position of vehicles, debris, and other evidence in relation to fixed landmarks.

Using triangulation, investigators can create a detailed diagram of the scene, which is critical for reconstructing the accident and understanding how it occurred. This method reduces the potential for error that can arise from measuring distances alone, especially in complex environments where multiple factors (such as curves, elevation changes, and existing structures) could impact measurements. Additionally, triangulation can provide a more comprehensive view of the scene, enhancing the investigator's ability to analyze the factors involved in the accident.

The other methods mentioned might serve specific purposes, but none provide the same level of accuracy in determining spatial relationships in the context of accident reconstruction as triangulation does.