This is the longer part of the Crumlin Viaduct on the Taff Vale extension of the
Newport, Abergavenny and Hereford Railway in Wales. Built 1854. Demolished in 1965. It originally
had 2 tracks but as engines and wagons got heavier it was reduced to one track in later years. There
are 3 sets of track attachment points so either configuration can be set. To use the 2-track
configuration do not connect anything to the center track attachment points. To use the 1-track
configuration connect invisible track to the outer two and the track of your choice to the center.