... (not "box" in Ireland) at the north end of the bridge. Drogheda station is at the south end. Building the new steelwork inside the old ironwork allowed the line to remain open during the reconstruction. More info: http://en.wikipedia.org/wiki/Boyne_Viaduct Here are a couple more views showing the gaunt turnouts at each end, looking north. All these photos are from 1986. The track was remodelled in the 1990s as a conventional single line with power-operated points at each end. 2_010302_330000000.jpg 2_010303_480000000.jpg The lookout man is for the P.W. gang just visible in the distance. I hope they were intending to come and fix that wing rail joint. The flat plates between the rails are guard rails, so that in the event that a vehicle becomes derailed on the bridge it is kept in a straight line and prevented from hitting the steelwork. Such guard rails are often provided on bridges and viaducts, although their design varies a lot. The track gauge in Ireland is 5ft-3in, which explains the wide look ...