When sizing up an incident involving medium or heavy trucks, what is the first step?

The appropriate first step when sizing up an incident involving medium or heavy trucks is to conduct an assessment of the scene. This step is crucial because understanding the dynamics of the scene allows responders to identify potential hazards, such as fuel spills, unstable vehicles, or downed power lines. Assessing the scene helps establish safety protocols for both responders and bystanders, ensuring that operations can be conducted without additional risk.

In assessing the scene, responders can gauge the overall environment, including weather conditions, accessibility for emergency vehicles, and the potential need for additional resources. This foundational information sets the stage for subsequent assessments—such as the personnel involved, the vehicles, or bystanders—facilitating a well-organized response to the incident. Proper sequencing in assessment ensures that priority is given to safety and risk mitigation, which is critical in incidents involving large vehicles that may pose unique dangers.