How should devices be placed at the beginning of work zones?

Answer: B — To give drivers adequate warning of upcoming changes in traffic flow

The correct approach for placing devices at the beginning of work zones is to provide adequate warning to drivers about upcoming changes in traffic flow. This ensures that drivers are informed of the potential hazards and can adjust their speed and driving behavior accordingly before entering the work zone. Implementing this practice helps to enhance safety for both the workers present in the work zone and the drivers navigating through it. By using devices such as cones, warning signs, and other traffic control measures, it creates a clear, visual representation of the work zone, allowing drivers to anticipate and react to changes in the roadway. This proactive communication is crucial in preventing accidents and maintaining smooth traffic flow. The emphasis is on making sure that drivers are aware of what lies ahead, rather than obscuring the work area or introducing randomness, which could confuse or surprise drivers. Such confusion not only increases risk but goes against the principles of effective traffic management and safety practices. Proper signage and marking at the start of work zones are fundamental components of traffic control that contribute to overall roadway safety.