Arizona republican., 1922-06-18

blows to a pavement surface. AS
| phaltic concrete roads, because of the
/ shock absorbing Qualities given them
! by the asphalt <nder, are able to
Withstand this constant pounding and
will carry the heaviest loads without
| injury. This high resistance to i'm
pact forces, explains the success had
with relatively thin pavements of the
type under concentrated truck traf-
fic-and accounts, in part, for the
constantly increasing popularity OF
asphaltic concrete
School for Highway Inspectors
North Carolina in carrying out It's
| $50,000,000 highway program. has in
| troduced a departure that promises
| to set swift pace for other states
| to follow. As a means of qualifying
its inspectors for the inspection OF
bituminous paving, the North Caro-
lima state highway commission.
| through it's division of tests and in
vestigations, has established short
course in bituminous laboratory and
plant instruction. The course is nee
essarily a short one and consists OF
| taking the men into the laboratory
| for about a week TO learn the differ
/ ent tests of the materials used and
| to attend lectures by the supervisors
of this type of construction. After
the laboratory and lecture courses are
over the men are taken to the as
| phalt plant for instruction in the
duties of the plant inspector and then
on the road for instruction regarding
| the construction methods to be used.
| The men for this work were Sc
| cured mostly from the different dis
| tricts into which the work of the
state highway commission is divid-
l ar llnr> Of
district is proportional to, the amount
| of this class of construction to be
| carried on. This will allow the men
to be located in the same district
they came from and the only need for
| any change would be in the demand
| for emergency inspection from an
other part of the state. To allow the
most efficient instruction to be given
within the allotted time, it was found
| necessary to divide the student in
| spectors into two classes.
Wheel Chairs on Florida Roads
| Occupants of wheel chairs are
abandoning trains in Florida and
| have joined the hosts of bicyclists,
pedestrians and motorists who under
| take long journeys on the highways
| of the state. The asphalt roads OF
| the peninsular state are in such ex-
/ cellent condition that occupants of
| wheel chairs are able to make their
way over the roads with little or no
| fatigue. A man in a wheel chair
recently covered 116 miles on the
road between Jacksonville and Day
| tonia without trouble. Another made
| the trip over the Dixie highway from
! Jacksonville to Miami. The last
named journey embraced 269 miles.
A $2,000,000 road has just been
~ IL. &f.4l ,ra1 II ~
provement district Of Arkansas, near
Pine Bluff, including rs miles of as
phalt pavement and two-course gray
ell compaction, from Stuttgart and
other points to the Jefferson county
line. Motor trucks will now be able
to pass over this highway with heavy
loads of rice from the 10000 acres Of
rice lands in that vicinity, affording
cheaper and quicker access to the
markets. Plans are now on foot for
constructing a connecting road with
Pine Bluff through Jefferson county.
Arkansas Louisiana Highway
Finished
The Arkansas Louisiana highway,
| pronounced one of the finest roads
in the south, is now completed, ac-
cording to information received from
the state highway department. The
entire system is now open to traffic.
The road is 1853 miles lang. 1t cost
approximately $3,500,100 and was
three years and six months in course
of construction. A total of ia miles
of the road is aphalt- surfaced, while
II miles are macadamized and 70
miles graveled.
In Arkansas the road traverses
Lincoln. Drew, Desha, Chicot and
Ashley counties. One branch of the
road extends from Grady through
McGehee, Lake Village and Eudora
to the Louisiana line. The western
branch of the road connects at the
Louisiana line with the road to
Monroe.
u. s. Roads Bureau Complies
Highway Costs
Average costs per square yard OF
various types of paving for country
roads have been compiled by the bu-
reau OF public roads. United States
department of agriculture. The fig
ures cover 6S, 900, 900 square yards of
paving constructed with federal aid
in all parts of the United States
during the period 1916 1921. The
costs per square yard are as folioWs:
Sand clay, is cents; gravel, As cents;
plain and surface treated macadam,
95 cents: bituminous macadam, $40;
| bituminous concrete, $3.50; plain &C.
ment concrete, s2.57; reinforced-ce-
ment concrete, $2.74, and brick, $40.
| These figures cover only the cost of
the paving: they do not include the
cost of grading.
A total of 2S,135 miles of road have
been built with government aid since
July /, 1916, when the congressional
act under which the federal govern
ment was authorized to aid the states
in road building went into effect.
The total estimated cost of these
roads has been S496, ,6S3.43. OF
this amount federal aid comprised
$211,135,376.31.
The average cost per mile of road
constructed during the five-year
period runs from $S,115 per mile for
graded and drained roads to $39, $40
per mile for concrete, and $49,570 for
brick roads. The average cost of all
roads. including graded and drained,
sand clay. gravel macadam (water
bound), macadam (bituminous), BIZ
luminous concrete. concrete and brick
roads, was $17,630. Federal aid was
at the average rate of $500 per mile.
Preferred Methods of Constructing
Brick Pavements
In line with it's recent action in
simplifying and standardizing the
sizes of paving brick, the National
Association of Paving Brick manu-
facturers has approved asphalt filler
as the preferred type for brick streets
ana roads. A resolution to this effect
adopted by the association sets forth
that its researches have shown for
some time a decided trend toward
the use of asphalt filler: that 60 per
cent of the brick pavements laid
during the past year were so filled,
and that it was clear that the major
ity of engineers and public officials
were convinced that asphalt filler in