ping.Trailer means semi-trailers or full trailers, as defined by U.S. DOT, which are:??? Built for explosives??? Loaded with explosives??? Operated in accordance with U.S. DOT regulations.U.S. DOT means the United States Department of Transportation.Vehicle means any car, truck, tractor, semi-trailer, full trailer, or other conveyance used for the transportation of freight.Water-gels or emulsion e