What does a filter light indicate?

A filter light is specifically designed to provide guidance to drivers about when they can proceed in a given direction, often while other traffic may be regulated. When you see a filter light, it typically indicates that it is safe to move through an intersection or to make a turn, as permitted by the light's indication. This is particularly important in busy intersections where pedestrian and vehicle traffic must be coordinated effectively.

The filter light often functions alongside standard traffic signals, but its specific purpose is to allow vehicles to proceed when it is safe, even if other indicators are displaying different messages for other traffic flows. Understanding the role of filter lights is crucial for maintaining safe driving practices and ensuring the smooth flow of traffic.