Over 70 percent of the nation's roads are located in snowy regions, which receive more than five inches (or 13 cm) average snowfall annually. Nearly 70 percent of the U.S. population lives in these snowy regions. Snow and ice reduce pavement friction and vehicle maneuverability, causing slower speeds, reduced roadway capacity, and increased crash risk. Average arterial speeds decline by 30 to 40 percent on snowy or slushy pavement. Freeway speeds are reduced by 3 to 13 percent in light snow and by 5 to 40 percent in heavy snow. Heavy snow and sleet can also reduce visibility. Lanes and roads are obstructed by snow accumulation, which reduces capacity and increases travel time delay. Please keep a safe distance and allow for space between you and the vehicle in front of you to avoid causing an accident.
Each year, 24 percent of weather-related vehicle crashes occur on snowy, slushy or icy pavement and 15 percent happen during snowfall or sleet. Over 1,300 people are killed and more than 116,800 people are injured in vehicle crashes on snowy, slushy or icy pavement annually. Every year, nearly 900 people are killed and nearly 76,000 people are injured in vehicle crashes during snowfall or sleet.