Final answer:
Scanning for pedestrians and other vehicles is critical when navigating a roundabout for safety reasons. Traffic signals contribute to this safety by controlling vehicle speeds and providing safe crossing times for pedestrians.
Step-by-step explanation:
When entering and exiting a roundabout, it is important to scan for pedestrians and other vehicles. Pedestrian safety is a significant concern, especially near campus areas where students and others are frequently crossing roads. Traffic signals play a crucial role in managing vehicle speeds and providing safe crossing points for pedestrians. They help in reducing the need for pedestrians to dodge traffic, and also act as a measure to control vehicles that tend to ignore posted speed limits. The installation of a traffic signal at a busy intersection significantly enhances safety by preventing vehicles from speeding through and by providing regulated crossing times for pedestrians, thereby potentially reducing the occurrence of accidents and improving the overall safety of the area.