28 
BULLETIN 1279, U. S. DEPARTMENT OF AGRICULTURE 
Table 11. — Rural road mileage by types and highway systems as existing January 1, 
1922, and mileage of each type built during 1921 in each State 
ALABAMA 
State roads 
State-aid roads 
County roads 
All rural roads 
Type 
Total 
Jan. 1, 
19221 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Unimproved earth 
Miles 
Miles 
Miles 
Miles 
Miles 
38, 236. 4 
5, 756. 
3, 773. 2 
5, 806. 1 
3, 317. 5 
424.0 
34.0 
3.0 
5.0 
10.0 
9.9 
Miles 
Miles 
38, 236. 4 
Miles 
Partly graded and 
drained earth 
205.1 
5, 756. 
3, 997. 7 
205.1 
Earth to definite 
grade with perma- 
nent drainage struc- 
tures 
3.2 
183.3 
106.2 
221.3 
208.8 
246.2 
41.3 
Sand-clay 
73.9 
75,0 
257.3 
6. 198. 2 
331.2 
Gravel. 
188. 3. 669. 9 
263.0 
Waterbound mac- 
adam 
465.3 
Surface - treated mac- 
adam 
6.5 
2.0 
34.0 
3.0 
10.7 
27.9 
10.5 
0.8 
6.5 
Bituminous mac- 
adam 
2.0 
Sheet asphalt 
5.7 
17.9 
0.6 
0.8 
5.7 
17.9 
0.6 
5.7 
Bituminous concrete . 
17.9 
Portland cement con- 
crete 
0.6 
Miscellaneous 
Total 
317.7 
173.1 
717.6 
57, 375. 1 
658.9 
58, 410. 4 
832.0 
1 Includes only mileage actually taken over and improved by State. 
ARIZONA 
State roads 
County roads 
Forest roads 
All rural roads 
Type 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Total 
Jan - 1, 
1922 
Built 
1921 
Total 
Jan. 1, 
1922 
Built 
1921 
Unimproved earth... 
Miles 
106.8 
335.6 
756.8 
Miles 
Miles 
15, 683. 8 
992.0 
1, 922. 8 
23.5 
744.1 
29.5 
2.5 
33.7 
168.7 
Miles 
*55. 1 
349.0 
Miles 
Miles 
Miles 
15, 790. 6 
1, 327. 6 
2, 875. 4 
23.5 
959.7 
29.5 
2.5 
34.8 
183.2 
Miles 
155.1 
Partly graded and 
drained earth. 
349.0 
Earth to definite 
grade with perma- 
nent drainage struc- 
tures 
37.5 
195.8 
83.1 
120.6 
Sand-clay 
3.5 
60.9 
3.5 
Gravel 
202.0 
150.0 
'224.5 
Waterbound mac- 
adam.. 
Bituminous mac- 
adam 
Bituminous concrete . 
1.1 
14.5 
13.6 
1.1 
1.1 
Portland cement con- 
crete 
131.9 
131.9 
13.6 
Total 
1, 430. 4 
202.2 
19, 600. 6 
600.4 
195.8 
83.1 
21, 226. 8 
885.7 
i New roads laid out but not improved. 
' Includes the 13.6 miles of State road constructed of volcanic cinders and classed as miscellaneous. 
