Which of the following reasons would not typically justify the installation of a traffic signal?

Installing a traffic signal is generally justified based on factors that directly impact traffic control, safety, and pedestrian activity. High traffic volume is a common reason, as signals help manage the flow of vehicles and reduce congestion. Increased pedestrian usage is another significant factor; signals enhance safety for pedestrians at busy intersections by providing designated crossing times.

Community requests can also play an essential role, as they often highlight safety concerns and specific local traffic needs, leading officials to consider the installation of a signal to address these requests.

In contrast, light pollution concerns do not typically warrant the installation of a traffic signal. Light pollution refers to the inappropriate or excessive artificial light that brightens the night sky, which can affect astronomy, wildlife, and human well-being, but it does not have a direct correlation with traffic control or safety at intersections. As such, this reason does not align with the typical factors that guide decisions regarding the need for traffic signals.