Final answer:
The purpose of orange and pink traffic signs is to advise and warn in construction and incident areas, respectively. They are chosen for their high visibility and to alert drivers to changes and potential hazards. Installing traffic signals helps manage vehicle flow and enhance pedestrian safety.
Step-by-step explanation:
The purpose of orange and pink traffic signs is to advise and warn in construction and incident areas (A). These colors are part of the secondary color palette and are highly visible in various lighting conditions, making them ideal for safety purposes such as caution signs or the uniforms of emergency workers. Purpose of orange traffic signs is closely related to construction areas, where they alert drivers to changes in normal traffic patterns or the presence of workers and machinery. Pink traffic signs, less common, are typically used for incident management, usually indicating temporary traffic conditions due to an accident or other unplanned events.
In the context of a traffic signal installation, such as the example at the intersection of Clay Street and Eagle Avenue, the primary reasons were to address speeding vehicles and enhance pedestrian safety, particularly for students crossing to reach campus. Without effective traffic control devices, the number of accidents increased to an unacceptable level, including incidents with severe consequences. Thus, the installation of a traffic signal helps manage vehicle flow and allows pedestrians to cross at designated times, mitigating the risks.