Show Traffic Densities Guide G do de Federal Fe cral Builders I your our automobile When hen you our over a n concrete or macadam or gravel surfacing do clo lo you iou ever o e er vender vonder just why that particular type va wa chosen Tho The choice of surfacing ng for all aU red Fed depends s on such fact fact- factors factors fact factors cral aid highways h ays ors as traffic ot of funds and the general level of ot road Improvement In the ar arba arba a Highways I says th the Bureau of oC Public Roads United I States of ot agriculture aree Department built in close record wi with the dem demands of traffic The Tho mort Port res scent stent and more e Improvements arc are arc to be found In sections of the count where traffic tr is heaviest hea lest In each geographical g geographical area I Ithe the tho number of registered motor vehicles per mile of ot the aid did system Is nn an approximate Index of o 0 he he of traffic I In the Middle States traffic is Ii dense and the number of ot motor per mile of 1 edera aid roads is h 35 and high type t pe pa pavements such as bituminous macadam bituminous concrete conCrete con crete and block pavements constitute 40 per cent of the Federal aid construe tion In the New Inglan States Stales type high high type surfaces are 87 per pent bent ent In the Pacific group the number of ot motor vehicles vehicles vehicles cles Is la per mile and high types con constitute con j 25 per cent Intermediate intermediate types 20 per cent and low Jow types 55 65 per cent I ot of the Federal aid mileage i i fh th the East North Central 1 South At- At At I I lands lantic West cst South Central East South Central West cst North Central and Moun Moun- Mountain Mountain tain the percentage of ot higher types of ot pavements pavement decreases with Ith the decreased number of of motor vehicles chicles per mile mUe and the percentage per of ot the low types Increases In ln the Mountain State where Is light tight the num num- num- num number number ber of or vehicles chicles Is given given sf en as 40 per mile and the bureau repol ts s the percentage or of pavements jas a as l 3 per cent In termed late types as JC per cent and low lowI t types pee is as 11 1 l per cent |