What is the purpose of a "doghouse" signal?

The purpose of a "doghouse" signal primarily serves to clarify and improve the flow of traffic at intersections, especially where multiple turns and complex maneuvers may take place. This type of signal generally indicates that more vehicles are allowed to turn at the intersection, facilitating smoother and safer traffic movement.

The design of these signals often uses additional indicators that display permissions for various directions simultaneously, which can help drivers make more informed decisions about when to turn without waiting for conflicting traffic. This improves overall efficiency and safety at busy intersections, as it allows for a greater volume of traffic to move with clear instructions.

In contrast to this correct function, other options do not accurately reflect the purpose of a "doghouse" signal. For instance, providing a safe way for dogs to cross or confusing drivers does not align with traffic management principles. Similarly, while five lights instead of three may imply complexity, that feature does not define the primary role of a "doghouse" signal in regulating vehicle movements at intersections.