Highfield, MD 6/23/2012 - Operating on CSX's Hanover Subdivision as Z-487, Maryland Midland's Union Bridge - Highfield turn (UBHF) is backing downhill through the crossovers after pulling nine cars off the west end siding in the Highfield yard limits. The train is backing onto the former Western Maryland Hagerstown-Baltimore mainline, owned from this junction east to Emory Grove by the Maryland Midland, to head east once again towards Union Bridge.