a trailer;

a tractor comprising a motorized vehicle configured to tow the trailer;

an air source mounted to the tractor and containing air compressed to a pressure above atmospheric pressure, the air source fluidly coupled to a brake system and a suspension;

a housing mounted on the trailer and remote from the air source, the housing containing an air transport structure;

said air transport structure further comprising a master valve forming a selective fluidic connection with the air source and controlling a flow of compressed air through a hose to a nozzle which receives and releases the flow of compressed air to the atmosphere as a directed flow, whereby detritus is blown off,

wherein operation of the master valve selectively fluidly isolates the hose and nozzle from the brake system and the suspension.