Study location | Reference | Study period | Average Annual Crashes |
Delaware | [24] | 2005-2020 | 13.7 |
Illinois | [8] | 2005-2008 | 193 |
Iowa | [6] | 1949-1959 | 280.6 (T) |
Iowa | [17] | 1949-1966 | 289 (T) |
Iowa | [25] | 2004-2006 | 199 |
Iowa | [8] | 2005-2008 | 190 |
Iowa | [4] | 2005-2011 | 228 |
Iowa | [26] | 2004-2014 | 191 |
Kansas | [8] | 2005-2008 | 110.2 |
Maryland | [5] | 2015-2008 | 58.5 |
Minnesota | [8] | 2005-2008 | 137.5 |
Missouri | [8] | 2005-2008 | 165 |
Nebraska | [8] | 2005-2008 | 79.5 |
New York | [13] | 2010-2012 | 67.6 |
North Carolina | [27] | 1995-1999 | 299 |
North Carolina | [22] | 1966-1999 | 145.5 |
North Dakota | [8] | 2005-2008 | 37.2 |
Ohio | [3] | 1989-1992 | 200 |
South Dakota | [8] | 2005-2008 | 34.2 |
Wisconsin | [8] | 2005-2008 | 170.2 |