What’s said to be the world’s biggest truck wash is located in Lloydminster, Canada. It apparently consumes almost 20,000 US gallons of water (about 75,000 liters) to wash a single truck!
The undercarriage wash alone (i.e. wheels, suspension and frame) uses almost 1,500 gallons each minute. I guess that’s necessary to get rid of the salt, slush, snow and ice from winter roads, or the dust, mud and grime of summer runs. It cost $140 (Canadian) to run the truck shown above through the wash.
Peter
As a Canadian who has worked in the trucking industry, that's actually a bargain and a good idea.
Alternative is to pay a shop helper to stand outdoors in sub-freezing weather, with a compressor and a wand, to do the same thing.
He can't get underneath the truck to get the salt off, and when he's done, you have a parking lot full of water which will soon become ice-not a good idea around 18-wheelers.