What is the primary function of traffic control devices?

The primary function of traffic control devices is to provide guidance and ensure the orderly flow of traffic. These devices, which include signs, signals, and pavement markings, are essential for maintaining safety on the roads. They communicate important information to drivers and pedestrians, such as when to stop, yield, or proceed, which helps to prevent accidents and ensures that traffic moves smoothly and efficiently.

By effectively guiding drivers, traffic control devices contribute to a predictable traffic environment, where road users can make informed decisions based on established rules and conditions. This orderly flow is crucial for reducing congestion and improving overall traffic management, highlighting the significance of these devices in everyday transportation scenarios.

The other options, while related to aspects of road safety and management, do not encompass the broad, primary role of traffic control devices in maintaining the overall order and security on roadways.