NSTWOS Ear
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Crash Situation Under Adverse Weather
Total Annual Crashes
Average = 6,301,000
Weather Related Crashes
By Road Weather Condition*
*Crashes that occurred under adverse conditions; additional factors such as rain, snow, and fog are not disaggregated from pavement conditions in this graphic. The percentage due to fog is for those crashes that occur under foggy conditions, but not wet, icy, or snowy pavement conditions. 
Source: Road Weather Management Program, Table: Weather-Related Crash Statistics (Annual Averages), Available at: http://www.ops.fhwa.dot.gov/weather/q1_roadimpact.htm