Which of the following is NOT included in the definition of a TTC zone?

Answer: C — zone for on-road safety training

The concept of a Temporary Traffic Control (TTC) zone encompasses areas where measures are put in place to facilitate safe movement through or around work zones, thereby minimizing disruption and enhancing safety for both workers and road users. The definition of a TTC zone includes specific components that are integral to managing traffic flow during construction or maintenance activities. This includes designated areas for construction, areas showing pedestrian detours, and places where traffic control devices like cones, signs, and barriers are utilized to direct and guide traffic safely around the work zone. A zone for on-road safety training does not fall within this scope, as it does not pertain directly to the management of traffic during construction activities. Safety training may occur in various environments and is not a function of traffic control for a work zone, making it outside the parameters typically associated with TTC zones. Thus, the inclusion of this option aligns with understanding the specific purpose and components that define a TTC zone, while the other options relate directly to it.