Highway & Heavy Construction, Volumen76

amount average bituminous blade brick bridge building cable calcium chloride cement cent Chicago coarse aggregate concrete contract contractor cost county highway crete economic emulsion engineer equipment Expansion Joint Federal filler freight funds gas tax gasoline tax grade gravel grout Harris County hauling units highway construction highway department highway engineer highway system improvement increase industry joint labor Littleford load macadam machine maintenance manufacturers material ment method mileage miles mill mixer mixing motor truck motor vehicle National operation pavement paving placed plant plate plow portland cement production projects Public Roads rail railroads railway ROADS AND STREETS roadway rock rolled roller sand slab speed standard Stanolind steel stone subgrade surface tests tion toll bridges tractor traffic transportation trusses viscosity welded wheels width