Under the Whyte notation a 2-8-8-4 is a steam locomotive with two leading wheels, two sets of eight driving wheels, and a four-wheel trailing truck. Other equivalent classifications are: * UIC classification: 1DD2 (also known as German classification and Italian classification) * French classification: 140+042 * Turkish classification: 45+46 * Swiss classification: 4/5+4/6 * Russian classification: 1-4-0+0-4-2 The equivalent UIC classification is, refined for Mallet locomotives, (1′D)D2′.