Protagonists:
Billy the Steam Shovel
Other Steam Shovels
Unknown Steam Roller
Unnamed Steam Flatbed Lorry
Sammie the Steam Locomotive
Tramper the Steam Traction Engine
Antagonists:
Diesel the Villainous Front-end Loader
Bad Bart the Villainous Excavator
Bad Barn the Villainous Bulldozer
Dinky and Dax the Villainous Dump Trucks
Cement the Villainous Cement Mixer
Craney the Villainous Crane Lorry
Ballasty the Villainous Ballast Tractor
Transporter the Villainous Transporting Lorry
Towers the Villainous Tower Crane