Lionel O 6-83173 Single Signal Bridge

Make your layout even more realistic with this bridge, equipped with lights that change from green to red to signify approaching trains of possible blocks. Lights change from green to red to warn approaching trains of occupied blocks aheadCompatible with both FasTrack and traditional tubular O and O27 track systemsUse an insulated track section or a 153IR (both sold separately)Dimensions: 3\” x 4\” x 7 \”