Why must the minimum green time for a traffic signal be sufficient?

The minimum green time for a traffic signal must be sufficiently allocated primarily to meet drivers' expectations of green light duration. When drivers are accustomed to certain timings, a signal that turns green too briefly can lead to confusion, frustration, or unsafe driving behaviors, such as running a red light. Sufficient green time gives vehicles adequate opportunity to clear the intersection safely, minimizing risks and promoting better traffic flow.

While there are reasons related to accommodating specific needs, like emergency vehicles or pedestrian safety, the overarching goal is to maintain overall traffic efficiency and predictability. This ensures that drivers can make informed decisions, thus enhancing road safety and reducing the likelihood of accidents. Understanding these dynamics is vital for traffic signal operability and urban traffic management.