This is a skewed bridge based on a prototype in Glasgow, Scotland over Cumberland Street. The bridge is custom designed for a layout built for the Central Model Railroad and Historical Society, see
this link for more details. The bridge comes with two piers connected with bridge shoes - the shoes may break during shipping, but can easily be repaired with glue when installing the bridge. In fact, their removal makes the bridge easier to paint and install. However, having them print as a connected part helps reduce the price of the model. The bridge spans an openning of 45.2 mm with an offset of 3.71 mm. The width of the bridge (15.82 mm between the girders) allows for a curve to begin on the bridge.