Final answer:
Traffic control devices regulate, warn, or guide traffic on streets, highways, or bikeways to ensure safe and efficient movement of vehicles and pedestrians.
Step-by-step explanation:
Traffic signals, markings, and other devices used to regulate, warn, or guide traffic on streets, highways, or bikeways are known as traffic control devices. These devices are placed by public agencies having jurisdiction to ensure safe and efficient movement of vehicles and pedestrians.
Examples of traffic control devices include stop signs, traffic lights, road markings (such as lane lines and crosswalks), speed limit signs, and pedestrian signals.