North Dakota DOT https://www.dot.nd.gov/divisions/maintenance/winter-preparation.htm https://www.dot.nd.gov/divisions/maintenance/winter-preparat... North Dako

North Dakota DOT https://www.dot.nd.gov/divisions/maintenance/winter-preparation.htm https://www.dot.nd.gov/divisions/maintenance/winter-preparat... North Dakota Department of Emergency Services https://www.nd.gov/des/get/severe-winter-weather/ https://www.nd.gov/des/get/severe-winter-weather/ The photo on the last link tends to point out the problem [edit: you haven't truly driven until you've attached a red flag to the front of your car (at an angle pointing forward) to warn people at a 4 way that there is a car]