4-8-8-4 the Western Pacific Railroad, which already rostered large 2-8-8-2s and 4-6-6-4s, but diesel locomotives were gaining popularity and soon were able to displace these Big Boy locomotives. 4-8-8-4 A 4-8-8-4 in the Whyte notation for the classification of steam locomotives by wheel arrangement, is a locomotive with a four-wheel leading truck, two sets of eight driving wheels, and a four-wheel trailing truck. These are commonly known as "Union Pacific Big Boys". Other equivalent classifications are: The equivalent UIC classification is refined to '(2′D)D2′' for Mallet locomotives. 4-8-8-4 Big Boys were only produced for the Union Pacific Railroad. Twenty-five such engines
How 2 was featured on the "30 Years of CITV" documentary that aired on ITV on 29 December 2012 and featured interviews with Dinenage and Jones. The last episode of the series was a 30th anniversary special. Before that, there was "The Best of How 2" which aired on 18 August 1997. There was no series aired in 1998 but there was a spin-off series called "How Goes 2", which aired from 25 February to 15 April 1998. The series focused on Fred and Gareth going to different places each week, and the 8 shows featured segments from the first 6 year