Final answer:
A traffic signal at an intersection can enhance vehicle speed control and improve pedestrian safety by providing designated crossing times and reducing the likelihood of speeding.
Step-by-step explanation:
The discussion around the need for a traffic signal at an intersection is primarily a matter of public safety and urban planning. Vehicle speed control and pedestrian safety are the two fundamental concerns that are being addressed. Firstly, the presence of a traffic light would likely reduce the tendency of vehicles to exceed the speed limit, as they would have to stop or slow down when the light changes. Secondly, the risk that pedestrians face when crossing the intersection would be decreased.
A dedicated signal for pedestrians would enable them to cross safely at designated times, instead of having to navigate through moving traffic. Lastly, the metaphor mentioning a "freeway" alludes to the broader concept of growth and development pathways that could lead to unsustainable outcomes without careful planning and control measures like traffic signals.