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Louis P. Cain
Table Df208-212 - Mileage built by state highway departments, by road type: 1923-1975

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  Df208 Df209 Df210 Df211 Df212
  Total Roads under state control
Total Earth roads High-type surface Low-type surface
Row Year Miles Miles Miles Miles Miles
1 1923 ---- 20,311 5,814 5,628 8,869
2 1924 ---- 23,164 5,957 6,697 10,510
3 1925 ---- 23,152 5,316 6,686 11,150
4 1926 ---- 26,552 7,060 6,132 13,360
5 1927 ---- 26,723 7,151 6,733 12,839
6 1928 ---- 29,252 8,675 8,748 11,829
7 1929 ---- 32,522 7,451 8,847 16,224
8 1930 ---- 35,277 7,813 10,787 16,677
9 1931 ---- 44,634 10,095 12,513 22,026
10 1932 ---- 35,971 6,394 10,009 19,568
11 1933 ---- 33,471 6,258 7,412 19,801
12 1934 41,730 41,730 5,917 6,386 29,427
13 1935 26,814 26,814 3,284 3,806 19,724
14 1936 32,274 32,274 3,361 4,706 24,207
15 1937 35,627 28,945 1,828 6,532 20,585
16 1938 36,322 34,598 1,187 5,751 27,660
17 1939 32,990 30,665 1,720 5,015 23,930
18 1940 32,588 29,689 1,423 5,217 23,049
19 1941 32,629 30,549 1,343 6,299 22,907
20 1942 19,670 18,078 1,038 4,167 12,873
21 1943 15,971 14,692 458 4,446 9,788
22 1944 15,080 13,924 289 3,925 9,710
23 1945 15,278 14,827 250 3,971 10,606
24 1946 21,711 20,856 417 4,898 15,541
25 1947 32,865 29,574 1,013 6,219 22,342
26 1948 41,968 35,085 1,403 7,753 25,929
27 1949 45,171 35,236 1,517 7,482 26,237
28 1950 55,487 44,265 1,784 13,379 29,102
29 1951 51,471 41,864 1,603 15,122 25,139
30 1952 57,847 46,354 1,238 17,811 27,305
31 1953 52,886 41,744 1,264 17,807 22,673
32 1954 55,488 42,053 866 19,730 21,457
33 1955 53,559 41,120 694 17,672 22,754
34 1956 57,454 44,016 486 20,726 22,804
35 1957 53,235 39,675 374 19,476 19,825
36 1958 54,753 39,824 313 23,644 15,867
37 1959 50,232 36,282 185 21,892 14,205
38 1960 49,443 36,944 328 22,013 14,603
39 1961 44,279 33,449 372 20,554 12,523
40 1962 52,585 41,052 433 26,305 14,314
41 1963 49,947 36,980 210 23,623 13,147
42 1964 45,298 36,203 275 22,664 13,264
43 1965 47,573 36,442 278 24,194 11,970
44 1966 80,142 38,968 249 27,152 11,567
45 1967 80,798 36,763 209 24,915 11,639
46 1968 78,939 37,279 403 23,617 13,259
47 1969 76,810 30,034 212 20,394 9,428
48 1970 74,287 33,834 68 24,637 9,129
49 1971 65,469 30,792 180 22,131 8,481
50 1972 64,288 25,431 62 19,027 6,342
51 1973 64,542 26,774 57 20,724 5,993
52 1974 69,492 28,416 36 19,837 8,543
53 1975 58,429 24,890 51 18,868 5,971



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