A cloud of typically black Sulzer moke erupts from D1501 as it crosses Roch Viaduct on 3 July 2011 with the 2J66 10:56 Rawtenstall to Heywood service, during the East Lancashire Railway's Diesel Gala. It is getting to grips with the gradient as it starts the arduous climb out of the valley of the River Roch (the river that gives its name to nearby Rochdale).