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.
2nd Biennial Report (1915-16)
3rd Biennial Report (1917-18)
4th Biennial Report (1919-20)
5th Biennial Report (1921-22)
6th Biennial Report (1923-24)
7th Biennial Report (1925-26)
8th Biennial Report (1927-28)
9th Biennial Report (1929-30)
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)
16th Biennial Report Addendum
17th Biennial Report (1945-46)
18th Biennial Report (1947-48)
19th Biennial Report (1949-50)
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