What is that snowplow pulling behind it? A tow plow is a large trailer with an adjustable blade that allows one operator to cover multiple lanes at once, increasing our efficiency at clearing the roads. The 26-foot wingspan is a formidable sight going down the road. Please use extra caution near tow plows. Our drivers are concentrating on operating the trucks and clearing the roads, give them room to get the job done. | Minnesota Department of Transportation