Final answer:
A traffic signal is needed at the 4-way stop to address issues such as speeding vehicles, pedestrian safety, and increased traffic flow.
Step-by-step explanation:
A traffic signal is needed at the 4-way stop in order to address several issues. First, many vehicles speed through the intersection without regard to the posted speed limit. A traffic signal would make vehicles slow down, preventing them from speeding through the signal. Second, pedestrian safety is a problem as many students and others cross this intersection. A traffic signal would allow them to cross at appropriate times, reducing the risk of accidents. Lastly, the amount of traffic has increased in recent years due to the opening of a manufacturing plant and the growth of businesses in the area. Installing a traffic signal would help manage the increased traffic flow.