Which of the following is NOT a principle of TTC procedures?

Answer: B — Cost-efficiency

Cost-efficiency is not considered a principle of Temporary Traffic Control (TTC) procedures. The primary focus of TTC is to ensure the safety of road users and workers while maintaining effective traffic flow through a work zone. Safety encompasses all aspects of TTC, including the correct setup of signage, barriers, and detours to minimize hazards for drivers and pedestrians. TTC zone maintenance and inspection are essential components related to the ongoing safety and effectiveness of TTC procedures. Maintenance ensures that traffic control devices remain functional and visible, while inspection is vital for assessing the ongoing compliance with safety standards and regulations. Although being cost-effective is important in planning and resource allocation, it does not supersede the overarching goal of ensuring safety in work zones, which is central to TTC principles.