The Pensacola journal. (Pensacola, Fla.) 1898-1985, 1914-11-09
Government Exhibit
At Road Congress.

The office of public roads Of the
United States Department Of Agricul'
ture will display at Atlanta, Ga, dur
Ing the Fourth American Road Con-
gress, November 9-13, a complete SCI
of models illustrating the construction
and maintenance of standard types OF
roads. The models will be so arranged
as to present the historical and tech
meal development of road building. IT
will be the most complete and inter
esting exhibition ever made by the
government on this subject.
An interesting feature of the exhibit
will be a set OF models showing the
evolution Of stone road building for
a period of two thousand years, and
will include the Appian Way, as rep
tion the early French roads during
the reign OF Napoleon I, the Telford
and early macadam roads built in
England during the reign Of George
". and macadam roads as they are
constructed today.
One Of the models illustrates the
characteristic features Of road con
structfon in the Swiss Alps; another
represents bhe best practice in this
country Of road location and reloca-
ton. In the latter model is shown
an old earth road, with characteristic
features, such as steep grades, Dad
alignment. dangerous grade crossing.
unsafe wooden bridge, poor location,
Inadequate drainage, dilapidated farm
buildings, and the old district school
house. with unsightly and unsanitary
surroundings. In the same model is
shown the new road, located on high
ground on side hill slopes, with easy
grades. pleasing and practical align
nent. with grade crossing eliminated.
permanent cu1vert and bridge, good
drainage, we'll constructed and main |
tanned n1acadam surface. slightly farm |
buildings, and attractive consolidated |
district schoolhouse supplied with pure |
water by means of windmill and reser !!
voir
The most approved methods of sub
drainage, for roads which pass over
soft or unstable ground, are shown by
a model which represents the V-drain,
the Telford base. and the French drain.
Models showing details of construc-
ton and important stages in the build
Ing of a reinforced concrete culvert
and a concrete bridge of the incased
steel I-beam type are also included.
Three of the models illustrate the
of earth, sand clay and
gravel roads. Miniature mechanical
models in actual operation show the
1uarrying and crushing of stone and
he use of a power roller working on a
nacadam road.
Since the coming Of the automobile, |
With the consequent aggravation Of the =
lust nuisance, numerous methods have
,een devised to secure lasting and
Iustless road surfaces. The most i'm !
'ortant of the types thus developed, t
side from the paved roads adapted t
o heavy traffic, such as asphalt block,
rick and concrete, of which apprc-
/ Z
rally cIassed as bftuminous construc- I
ION. These types have been largely I
eveloped during the past Few years, .
nd are represented in the exhibit by i
ne following models: Surface treat =
lent OF new macadam road; resur- :
ace of old nnacadam road by the pene-
-ation method; penetration method; :,
hiking method; mixed filled method: ?,
ocl1 asphalt; and Topeka specifca-
on. a
All the models are built to the scale
I one inch to the foot, or one-tweIfth q
; the full size. =
An automatic projectoscope will pre-
mt large number of self-reading U
intern slides, showing road scenes in
any parts OF the United States.
Several sets of motion picture films,
construction scenes on the 81
,st roads now being built by the Of tie
e of public roads in corporation as
it'll the postoffice department, and IL
e various states, will be shown from
ne to time in the Biograph room
ne motion picture films to be shown
G as follows: Building gravel road =,
Fairfax county. Virginia; building co
1cadam road in Montgomery county, st,
aryIand; building bituminous maca- er
m road by the penetration method. 20
lr,aouta, Maine; building concrete br
I'd, GAINESVILLE, Ohio; and testing fe,