What is the application of a type A warning light in work areas?

The correct application of a type A warning light is as a low-intensity flashing yellow light, particularly when used during nighttime operations. This specific usage enhances visibility for drivers in work areas where conditions might be less than optimal, effectively reducing the risk of accidents.

When utilized at night, the flashing yellow light serves to alert motorists to the presence of potential hazards or changes in traffic patterns due to work zones. The low intensity of the light is designed to attract attention without being overly blinding, ensuring that the warning is clear and effective without compromising the safety of both the workers and the passing vehicles.

In contrast, steady burning yellow lights are not classified as type A warnings and are generally used to outline edges or to mark stationary obstacles. Other options that limit the use of type A lights based on time of day do not apply, highlighting the importance of understanding when and how these lights should be utilized to maximize their effectiveness in traffic control.