Roadside emergencies expose first responders to the dangers of moving traffic. Emergency traffic control equipment helps define the work area and provides approaching drivers clear visual warnings.  Cones mark boundaries and help direct vehicles away from active operations. Warning signs give motorists advance notice of hazards or changing traffic conditions. Light wands and other visible signaling devices help responders communicate with drivers, especially during nighttime operations or poor visibility.

The right emergency traffic control equipment depends on the scene.  A highway collision may call for a different setup than a roadside rescue on a narrow road, so departments should consider traffic speed, sight distance, available space, and the speed at which equipment can be deployed.