What measure can EMTs take to secure a safer extrication scene?

Establishing a safe extrication scene is crucial for the safety of both the emergency personnel and the victims involved in an accident. Setting up road flares every 10 feet to divert traffic is an effective measure because it helps create a visible barrier that alerts oncoming vehicles to the presence of an emergency situation. This strategy aids in managing traffic flow and reducing the risk of secondary accidents, which can be a critical concern at an extrication scene.

In addition to this, setting up flares around hazards like spilled fuel is also important. However, the key point in this question is the general practice of using road flares to guide and divert traffic effectively, which is best emphasized by their strategic placement along the roadway.

The other options provided either contain less effective or more dangerous approaches—such as dropping flares from the ambulance, which could create a risk for the EMTs and others at the scene. Therefore, while diversifying the use of flares can enhance safety, the primary measure of placing flares every 10 feet works effectively for general traffic management in the vicinity of an extrication scene.