Which of the following actions is necessary to develop an accurate site plan after an accident?

Taking measurements of the site is essential for developing an accurate site plan after an accident. Measurements provide a precise understanding of the spatial relationships and dimensions of the area involved in the incident. This detailed information is critical for analyzing the circumstances surrounding the accident, identifying potential hazards, and determining liability.

An accurate site plan can help visualize the layout of the area, including key landmarks, the positions of vehicles, pedestrians, and any other relevant elements. These tangible details are core to reconstructing the event and support any investigations that may follow. Without precise measurements, any site plan may lack reliability and fail to capture important factors that could influence legal proceedings or safety assessments.

The other actions listed are not sufficient on their own to create an accurate site plan. For instance, conducting a risk assessment is important but it focuses more on safety and future prevention rather than creating a direct representation of the accident scene. Gathering only verbal accounts does not provide the necessary spatial data and can be subjective. Documenting the event in writing is also important for record-keeping, but it does not replace the need for a detailed, measured representation of the site. Therefore, taking measurements is the only action that directly leads to the creation of an accurate and usable site plan following an accident.