Which of the following actions should investigators take to communicate warning to other drivers at the scene?

• A. Place warning devices
• B. Do nothing
• C. Block all traffic permanently
• D. Wait for EMS

Answer: (A)

The key idea is to maintain scene safety by making approaching drivers aware of the hazard. Placing warning devices—such as cones, flares, and reflective triangles—upstream and in clear view signals motorists to slow down and steer away from the scene, creating a safe buffer for responders and others working there. This immediate communication helps prevent secondary crashes and protects everyone at the site.

Doing nothing provides no warning, waiting for EMS delays traffic control, and blocking all traffic permanently isn’t practical or safe. The goal is to actively manage traffic with visible warnings so drivers can react in time.