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Continue to ChatIowa DOT data: blue and white lights reduce crashes with snow plows https://www.radioiowa.com/2017/10/23/iowa-dot-data-blue-and-white-lights-reduce-crashes-with-snow-plows/
Iowa DOT data: blue and white lights reduce crashes with snow plows https://www.radioiowa.com/2017/10/23/iowa-dot-data-blue-and-white-lights-reduce-crashes-with-snow-plows/