Final answer:
Speed should be reduced when approaching a traffic signal at an intersection to enhance safety and prevent accidents.
Step-by-step explanation:
Speed should be reduced below the posted speed limit for a variety of safety reasons. Firstly, the presence of a traffic signal at an intersection necessitates that drivers slow down to adhere to the signal's commands, which helps in regulating traffic and enhancing pedestrian safety.
For example, before the installation of a traffic signal at the intersection of Clay Street and Eagle Avenue, vehicles sped without regard to the posted speed limit, putting pedestrians at risk, particularly students commuting to and from campus.
Consequently, there was a significant increase in accidents, some of which were severe and even fatal. The reduction in speed facilitated by a traffic signal thus serves as a critical safety measure to protect all road users.
Traffic signals are installed to regulate vehicle speed and ensure pedestrian safety, especially in areas with high accident rates or many pedestrians crossing.