Final answer:
No standing signs allow the temporary stop to load or unload passengers but prohibit parking. Traffic signals help control vehicle speed at intersections, improving safety by preventing vehicles from speeding through them.
Step-by-step explanation:
The question pertains to the rules of traffic signs, specifically no standing signs. The distinction between no standing and no parking is important for drivers. No standing signs permit a driver to stop temporarily to load or unload passengers, but do not allow parking, meaning you can't leave your car unattended or stay for an extended period. When it comes to traffic control measures like traffic signals, their installation is primarily for safety concerns.
As noted in the information provided, the presence of a traffic signal could be beneficial in places where vehicles tend to speed through an intersection, disregarding the posted speed limit. The traffic signal acts as an enforcement mechanism, encouraging vehicles to slow down since they cannot speed through it. Traffic signals can significantly contribute to the reduction of speeding and improve the overall safety of an intersection.