What is the main advantage of using a preemption system in traffic signals?

The main advantage of using a preemption system in traffic signals is improved response time for emergency vehicles. Preemption systems are designed to detect an approaching emergency vehicle, such as an ambulance or fire truck, and alter the traffic signal sequence to provide a clear and immediate path for the emergency vehicle. This functionality is crucial in life-threatening situations where every second counts, allowing the emergency responders to reach their destination more quickly and efficiently.

In contrast, while reduced waiting time for pedestrians, decreased traffic flow incidents, and enhanced visibility of signals are important aspects of traffic management, they are not the primary purpose of a preemption system. The primary function is focused on prioritizing the movement of emergency services, which directly contributes to better emergency response and public safety.