This is an interactive single track Scherzer Rolling Lift bridge with a 50 ft long deck plate girder as the moveable span and 169 ft trestles on both ends. Height adjustable. This is a modified version of the original by Ben Dorsey (AKA bendorsey) which uses different textures and where the attached invisible track does not use the adjoining track type and stays invisible as it should. My thanks to bendorsey for his fine work and item.