Heavy Haulage (Draft outline, expansion required) The movement of modern Tractors and Construction Plant due to the size and weight of machines, requires the use of specialist equipment. The contractors involved in this are often referred to as "Heavy Haulage Contractors". The collection of Older heavy Haulage Tractors is a growing hobby, with some people collecting older units to move their "Classic Plant or Tractors", others just collecting BIG trucks as they look impressive, and some are quite rare, but are generally cheaper than Steam Image:Chris Bennett volvo.jpeg Engines or Trains.