Final answer:
Three types of traffic control devices are traffic lights, Stop and Yield signs, and signs indicating rules like speed limits and parking regulations. Traffic signals can greatly improve safety by controlling vehicle speed and allowing safe pedestrian crossings.
Step-by-step explanation:
There are several types of traffic control devices used to manage vehicle and pedestrian traffic on roads. Three types of traffic control devices include: Traffic lights: A traffic control signal is essential at busy intersections as it regulates vehicle movement and ensures pedestrian safety by allowing orderly transit and designated crossing times.
Stop signs and Yield signs: These help in controlling traffic flow at less busy intersections, where a full traffic signal might not be necessary, but where drivers and pedestrians still require guidance on right-of-way and stops. Speed limit signs, No parking signs, and School zone signs: These informational signs communicate important rules and guidelines that drivers must follow, such as speed limits, parking regulations, and areas where children are present and drivers should be extra cautious.
Installing traffic signals can significantly reduce the risk of accidents, control speeding vehicles, and help protect pedestrian safety, as evidenced by reduced incidents after their implementation at various intersections.