1. Traffic Signs: These are the most common type of traffic control device and can convey a variety of messages to drivers, including speed limits, directions, and warnings about hazards.
2. Traffic Lights: These devices use colored signals to control the movement of vehicles and pedestrians at intersections.
3. Traffic Markings: These are markings painted on the road surface that provide guidance and instructions to drivers. Examples include lane lines, crosswalks, and stop lines.