After the 1988 merger of Rio Grande and SP, many locomotives were modernized. During the 1990s, ditch lights were added to locomotives for added visibility in grade crossings. While keeping their nose-mounted gyralights, front ditch lights and cab beacons were added to many Rio Grande units. By the late 90s, the gryalights and beacons were removed.
After the 1988 merger of Rio Grande and SP, many locomotives were modernized. During the 1990s, ditch lights were added to locomotives for added visibility in grade crossings. While keeping their nose-mounted gyralights, front ditch lights and cab beacons were added to many Rio Grande units. By the late 90s, the gryalights and beacons were removed.