These reports are published every two years by the Arkansas Department of Transportation (ARDOT) and present statistical and historical data concerning the operations of the ARDOT over a two fiscal year period which is referred to as a biennium.
- 55th Biennial 2021-2022
- 54th Biennial 2019-2020
- 53rd Biennial 2017-2018
- 52nd Biennial 2015-2016
- 51st Biennial 2013-2014
- 50th Biennial 2011-2012
- 49th Biennial 2009-2010
- 48th Biennial 2007-2008
- 47th Biennial 2005-2006
- 46th Biennial 2003-2004
Early AHTD Biennial Reports (1915-1950)
These reports were published every two years by the Arkansas State Highway and Transportation Department (AHTD) from 1915 through 1950 and contain historic data about highway projects and AHTD operations.
10th Biennial Report (1931-32)
11th Biennial Report (1933-34)
12th Biennial Report (1935-36)
13th Biennial Report (1937-38)
14th Biennial Report (1939-40)
16th Biennial Report (1942-44)
17th Biennial Report (1945-46)