Final answer:
In heavy traffic, do not enter an intersection until you can safely get through without stopping. Traffic signals manage flow and ensure pedestrian safety; adhering to them is essential for preventing accidents.
Step-by-step explanation:
In heavy traffic, do not enter an intersection until you can get through it without having to stop and potentially block traffic. A traffic signal is often installed at busy intersections to manage vehicle and pedestrian traffic effectively. By requiring vehicles to slow down and potentially stop, a traffic signal can prevent them from speeding dangerously through the intersection. Such measures are not only crucial for pedestrian safety, especially in areas with heavy foot traffic such as near a campus or business district, but also for reducing the likelihood and severity of accidents. It is important to note that one should always be aware of their surroundings and obey traffic signals to ensure safety for all road users.