What colour are the lights for service roads intersecting with movement areas?

Service roads that intersect with movement areas utilize red lights to indicate their presence and alert vehicle operators about the potential hazards associated with these intersections. The use of red lights is standard practice in aviation safety protocols, as red is universally recognized as a warning signal. This color effectively signifies that vehicles must take caution when traversing these areas, ensuring safety for both aircraft and ground vehicles.

The other colors mentioned, such as blue, white, and flashing green, are typically used for different purposes within the airside environment, such as indicating various movement permissions or operational statuses, but they do not serve the same function as the red lights at service road intersections. Understanding the specific significance of these color codes is crucial for maintaining safety and compliance within the airport's operations.