GCOR rule 5.13 reads…
5.13 Blue Signal Protection of Workmen
This rule outlines the requirements for protecting railroad workmen who are inspecting, testing, repairing, and servicing rolling equipment. In particular, because these tasks require the workmen to work on, under, or between rolling equipment, workmen are exposed to potential injury from moving equipment.
Blue Signal Protection of Workmen
As used in this rule, the following definitions apply:
Workmen. Railroad employees assigned to inspect, test, repair, or service railroad rolling equipment or components, including brake systems. Train and yard crews are excluded, except when they perform the above work on rolling equipment not part of the train or yard movement they are handling or will handle.
“Servicing” does not include supplying cabooses, engines, or passenger cars with items such as ice, drinking water, tools, sanitary supplies, stationery, or flagging equipment.
“Testing” does not include an employee making visual observations while on or alongside a caboose, engine, or passenger car. Also, testing does not include repositioning the activation switch or covering the photo-electric cell of the marker when the rear of the train is on the main track. The employee inspecting the marker must contact the employee controlling the engine to confirm that the train will remain secure against movement until the inspection is complete.
Group of Workmen. Two or more workmen of the same or different crafts who work as a unit under a common authority and communicate with each other while working.
Rolling Equipment. Engines, cars, and one or more engines coupled to one or more cars.
Blue Signal. During the day, a clearly distinguishable blue flag or light, and at night, a blue light. The blue light may be steady or flashing.
The blue signal does not need to be lighted when it is attached to the operating controls of an engine and the inside of