Showman's road locomotive
A showman's road locomotive or showman's engine is a steam-powered road-going 'locomotive' designed to provide power and transport for a travelling funfair or circus. Similar to other road-going traction engines, showman's engines were normally distinguished by the addition of a full-length canopy, a dynamo mounted in front of the chimney, and brightly coloured paintwork with ornate decorations.
Source: Wikipedia — Showman's road locomotive (CC BY-SA 4.0)