ROAD MILEAGE, CENTRAL AND WESTERN STATES. 9 
Every able-bodied male over 21 and under 60 years of age residing outside incor- 
porated cities and towns, and not exempt by law, is required to pay a road tax of 
$2 a year. 
Provision is made for the working of State convicts in the construction and main- 
tenance of State highways and bridges under the control and supervision of the 
board of control and the State engineer. Funds to meet the cost of so working pris- 
oners are provided out of the prison-maintenance fund and the State road-tax fund. 
Counties receiving the labor of State convicts shall not, during the same fiscal year, 
be entitled to receive any portion of the State road-tax fund under the board of con- 
trol, except such as would be a proper engineering charge. 
ROAD MILEAGE. 
According to the reports received, Arizona had on January 1, 1914, a total of 12,075 
miles of public roads, of which 253.43 miles, or 2.09 per cent were surfaced. Of the 
surfaced roads 11.23 miles were macadam, 13.50 miles were bituminous macadam, 
125.7 miles were gravel, 45 miles were sand-clay, 50 miles were cinders, 7 miles were 
oiled gravel, and 1 mile was oiled caliche or gravel. There were also reported 2,695.96 
miles of graded and drained earth roads. The total of all public roads reported for 
1909 was 5,987 miles, of which 273 miles, or 4.56 per cent, were surfaced, thus indi- 
cating that the total mileage increased considerably, while the surfaced mileage is 
about the same as that reported for 1909. Detailed information in regard to road 
mileage in Arizona at the close of 1914 is shown by counties in Table 7. 
REVENUES APPLIED TO ROADS AND BRIDGES. 
The total revenue applied to roads and bridges in 1914 amounted to $982,721.22, of 
which $523,114.44 was derived from general county road and bridge taxes, $94,930 
from per capita and other taxes, $8,780.59 from county bond issue funds, and $355,896.19 
from State appropriations, motor vehicle tax, and State road tax. In 1904 Arizona 
applied $109,309.43 to road and bridge work. The gain in 1914 over 1904 was 
$873,411.79, or 799 per cent. Revenues applied to roads and bridges are shown in 
Table 30. 
ROAD AND BRIDGE BONDS. 
The total county road and bridge bonds outstanding on January 1, 1915, amounted 
to $295,000. In 1914, $275,000 road and bridge bonds were voted and sold, and $5,000 
retired. Only $8,780.59 was expended from bond funds during 1914. The bond 
transactions are shown in Table 53. 
CALIFORNIA. 1 
California has a land area of 155,652 square miles, a total road mileage of 61,039, of 
which 10,279.73 miles, or 16.84 per cent, were surfaced at the close of 1914. 
There is a department of engineering, which consists of an advisory board, composed 
of the governor, as ex officio member and chairman, the State engineer, the general 
superintendent of State hospitals, the chairman of the State board of harbor commis- 
sioners of San Francisco, and three other members. The State engineer and three 
members are appointed by the governor, and serve during his pleasure. The depart- 
ment of engineering, by and through the chairman of the advisory board, is authorized 
to appoint a State highway engineer, skilled and experienced in highway construction. 
The department also is authorized to appoint assistant engineers and other assistants 
as needed. All State highway work is under the direction and supervision of the 
department of engineering, which is charged by the legislature with the duty of 
acquiring, constructing, and maintaining a system of State highways, for which an 
issue of $18,000,000 of State bonds has been authorized. This duty is exercised by 
1 In collecting the information for California assistance was rendered by A. B. Fletcher, State highway 
engineer, and collaborator of the U, S. Department of Agriculture. 
