road train 
noun chiefly Australian
A large lorry pulling one or more trailers.The typical annual turnover of a road train is $300,000 of which around 80 per cent goes on expenses, including fuel and tyres, a big shot in the arm for the local economy....
- During testing at Northern Territory's Tanami Desert, the Kenworth hauled gold-bearing ore in 400 tonne, six-trailer road trains.
- The proposal would see 4km of bitumen added to the partially sealed 47 km long Carnarvon-Mullewa Road for the purpose of transporting up to 100 road trains each day.
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