Final answer:
An evacuation site exposed to vehicular traffic must have reinforced barriers as a primary safety measure to prevent accidents and protect evacuees.
Step-by-step explanation:
When exposed to vehicular traffic, your evacuation site must have adequate safety measures to ensure the protection of those in the evacuation zone as well as those in the vicinity. While warning signs, adequate lighting, and trained personnel are crucial, it's most imperative to have reinforced barriers to physically separate the evacuation area from traffic, minimizing the risk of accidents and ensuring the safety of evacuees. This aligns with safety protocols following incidents like those mentioned where an evacuation zone was set up around a plant following radioactive fallout. Safety equipment such as a fire extinguisher and the establishment of safe zones are fundamental in any safety protocol.