Show PROVED IMPROVED ROADS vf COST OF GRADING HIGHWAYS great variation in conditions Condl tlona in dlf ferent sections section of country la is noted in data oy ay th unald states department of A great variation in ili tile conditions under which grading gi for highways la is done in ili cliff llaurent erent sections or of tile united states Is ted in ili cost data coin plied piled by tile tho bureau of public roads roada united states deportment department of agrical anre on lo 10 1 0 miles of federal aid road the cover the four year vt to 1017 I 1 nud and tire are based on oil a kotul of 2 million yards of earth for thet proui ol of status states tile thu average price ivr cuble cubic yard la Is iii follows new kait annd and middle states stales H enst it s t north central west north central Con Cen trul 0 ta south atlantic kuat south con coil aral west south central mountain and states the geneval average price was probably alic moat important fac factor tor lift eating nc the cost was tile of grading to bo be done per wile nule tile tho quantity being very verr dinall lit in the groups having tile the highest prices in general it a noticed that where mostly old roads roada are rebuilt the light work and fand tearing up tile old pavement greatly affected tile tho cost the amount of line grading or trimming required for tile higher types ol of pavement was also a factor tabor ibor costs character of soil to ri ax 0 f gasoline dill lei id smaller when cars cara aro are run over cement concrete roads graded climatic almo llull un contracts and nd cost coat of detours foi traffic also affected tile tho cost fuch each group groua of states did not haj ahmo hmo 0 the ellk buinie volume of grad ilig baull year fear tind and lio IKS Li figure r for orthe alio whole country counti y Is ls not truly rep r it Is interesting to noto note that the avera average 11 0 cost of gr cradill adill g grad 1111 bally roso rose front from 0 O ID in the first q tar ter of 1017 to in the ie fourth q quarter fqy of 1030 1019 and then gradually dually declined to in the third quarter of idl 1 it in 14 probable that tho latter hitter figuro would bo be somewhat higher luid had au all of tho the states let york work in ili timi quarter |