Final answer:
Traffic signals are used to manage traffic flow and enhance safety at intersections, allowing for the orderly crossing of pedestrians and adherence to speed limits.
Step-by-step explanation:
The device used to return road users to their normal path after an intersection is a traffic signal. Traffic signals play a crucial role in managing traffic flow and enhancing safety for all road users, including pedestrians. They help in regulating vehicle movement and ensuring that vehicles do not speed through intersections indiscriminately.
Pedestrian safety is a significant concern at intersections, especially near campuses where students frequently cross. The installation of a traffic signal allows pedestrians to cross at designated times, reducing the risk of accidents. Moreover, the presence of a traffic signal has been shown to decrease the number of accidents, as it forces drivers to adhere to the posted speed limit and be more cautious about crossing pedestrians.