What generally influences the decision on the use of specific traffic control devices?

The decision on the use of specific traffic control devices is primarily influenced by the nature of the traffic volume and road conditions. This is critical because effective traffic control relies on assessing how many vehicles will be using the roadway, the types of vehicles involved, and the specific characteristics of the road itself, such as its size, location, and existing traffic patterns.

Traffic volume is an essential factor; for instance, a busy urban area might require more substantial or multiple traffic control devices compared to a rural road. Road conditions, including surface conditions and visibility factors, also play vital roles in determining the appropriate devices. These conditions dictate how well traffic can flow safely around work zones and ensure that risks to both workers and motorists are minimized. Therefore, the use of traffic control devices must be tailored to these practical considerations to manage traffic effectively and ensure safety.