R 408.10026 De-railers, bumper blocks, and clearance signs.

Rule 26.(1) Where rolling railroad cars on a spur track could make contact with a railcar being loaded or unloaded, repaired or serviced, or enter a building, work or traffic area, de-railers, bumper blocks, a blue flag or blue light, or other equivalent protection shall be used . (2) A visible "Close Clearance" sign shall be used to indicate close clearance between a railcar and an adjacent fixed object if the fixed object is located less than 8 1/2 feet from the center of a straight track and 9 feet from the center of a curved track.