Victorian Railways Dd class

This article is about the 1902 D^D class and the 1908 ${\displaystyle \mathrm {D_{E}^{D}} }$ steam locomotives. For the 1876 D class steam locomotive ("Rodgers"), see Victorian Railways D class (1876). For the 1887 D class steam locomotive, see Victorian Railways D class (1887).

The D^D class (later reclassified into D¹, D² and D³ subclasses) was a passenger and mixed traffic steam locomotive that ran on Victorian Railways from 1902 to 1974. Originally introduced on mainline express passenger services, they were quickly superseded by the much larger A² class and were relegated to secondary and branch line passenger and goods service, where they gave excellent service for the next fifty years. The D^D design was adapted into a 4-6-2T tank locomotive for suburban passenger use, the D^DE (later D⁴) class. They were the most numerous locomotive class on the VR, with a total of 261 D^D and 58 ${\displaystyle \mathrm {D_{E}^{D}} }$ locomotives built.