Essential details for today′s railroads big and small are easy to model with the Modern Trackside Details Kit from SceneMaster! Based on equipment used all across North America, the HO set is a terrific value with parts to build: Two modern track-mounted hotbox detectors Two track-mounted modern dragging equipment detectors Four access road gates with posts Two, two-door relay cabinets Two four-door relay cabinets Two sets of Automatic Equipment Identification (AEI) readers - build with short or tall poles, with or without safety bases, both styles included Two pole-mounted solar arrays with collector panel decals