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