Final answer:
At a traffic signal, a change from green to yellow indicates that drivers should prepare to stop if safe. Traffic signals enhance pedestrian safety by regulating vehicle flow and reducing speeding.
Step-by-step explanation:
A traffic signal changing from green to yellow means that drivers should prepare to stop if it is safe to do so. Pedestrian safety is greatly enhanced by traffic signals, as they manage the flow of vehicles and allow pedestrians to cross intersections at appropriate times. Traffic signals also encourage vehicles to adhere to the speed limit, reducing incidents of speeding through intersections. For example, at the intersection of Clay Street and Eagle Avenue, the installation of a traffic signal led to a regulated traffic flow, thus improving safety for both drivers and pedestrians. If a driver encounters a yellow signal, it indicates that the signal will soon turn red, and they should slow down and come to a stop, preventing potential accidents and enhancing safety.