What is the required sequence for applying blue signal protection on tracks other than the main track?

The correct sequence for applying blue signal protection on tracks other than the main track begins with lining and locking the switch, followed by displaying the blue signal and checking for compliance. Lining and locking the switch first ensures that the track is securely set and prevents any unintended movement of trains or equipment before signaling. By taking this step initially, it promotes safety by making certain that the equipment is in position and cannot be moved inadvertently.

Once the switch is secure, displaying the blue signal communicates to all crew members that protection is in place, indicating that work can safely proceed in the area. Checking for compliance ensures that all personnel are aware of and adhere to the protection in place, which is critical for maintaining safety during operations.

The importance of this sequence is highlighted by how earlier steps can mitigate risks associated with unauthorized movements and assure that all safety protocols are observed before any work begins on the track. This methodical approach aligns with the safety protocols put forth by the BNSF operating procedures.