In a color-coded air brake system, which color represents the Service/control line?

In a color-coded air brake system, the service/control line is represented by the color blue. The blue line is crucial as it is used to convey the control signals that operate the service brakes, which are the brakes that engage when the driver applies pressure to the brake pedal. This system allows for clear identification of air brake lines, enhancing safety and efficiency during maintenance and operation.

The other colors in the system serve specific functions for different lines. For instance, red typically signifies the emergency line, which is responsible for activating the emergency brakes. Understanding this color coding is essential for drivers and maintenance personnel to quickly diagnose issues and ensure safe operation of the vehicle's braking system.