Show S f 5 S t FOE OF MACADAM ROAD I I Motor Vehicle Sweeps Sweep Roadway ol 01 S Dust Dut Needed fo for Binder At the time the worst foe ot ol otI olI I I the macadam road Is la perhaps ita iti most ardent advocate the advocate the motor vehicle ve ye e I bide hicle The steel wheels of the ordinary ordinary or or- I vehicle grind bl t lent t S powder from the stones atones to serve as a binder replacing the binding material blown away by winds or washed off by rains It is usually possible binder becomes deficient and the stones In the upper course begin to appear and the surface grows rough I to spread a little coarse sand in the i center of the macadam road The sand sandis is soon spread by traffic over the great er cc portion of tho the width of the I am nm It relieves the roughness and keeps the stones from raveling This practice has been followed in many sections for years But Dut the swiftly swiftly- moving motor car of the present day has has' Introduced a new problem into road maintenance The large rubbe tires on wheels of small diameter appear ap pear to exert a suction on on the binder of the road The vacuum m caused by bythe y the vehicle moving rapidly over the tha road lifts the tho dust Into the air in clouds and it is blown away into tho the fields Various substances are being experimented ex cx with for application to road surfaces to lessen or obviate this evil Coal tar and oils with an as as base seem to give the best re re- re suIts In France Franco tar Gas as been used for several years years It is said most satis satis- It may be that by some such application not only will the tho roads be saved from denudation by motor vehicles but the ordinary surface sur face repair costs will be lessened as well A properly built macadam road Inthe in inthe inthe the country rarely becomes muddy except from mud tracked upon it from front side roads built of natural soil soli The Tho country road official is spared this annoyance and the expense of removIng removing removing ing the mud That they are often orten dusty can not be denied Watering or sprinkling is a luxury that can not often orten be bo afforded on country roads When properly applied water not only lessens the dust nuisance but preserves pre serves the road as well No one having had experience in such matters will contend that a a. macadam macadam ma ma- cadam road may generally be maintained main tamed at a less cost than a gravel or oran oran oran an earth road Sometimes under certain cere tam tain conditions the macadam maintenance ance costs costa may be less but this does not occur usually But Dut It is true that thata a macadam road may at a moderate expense be kept smooth hard and serviceable at all times of the year and that these requirements can not be met by either the earth or the gravel road AUSTIN A. A FLETCHER |