Show maintenance COST OF ROADS ultimate economy of concrete road depends on the small amount needed to keep it up the cost of a road involves not only first cost but the cost coit of keeping it in ili continuously usable condition it if this were not so the lie cheaply built gravel ro road a d would he entirely suitable for or our ninin main thoroughfares the ultimate economy of the concrete road depends upon the ex es nely email mall amount of money required to keep it in excellent condition the only maintenance heeded on a well built concrete road broad Is that necessary to keep filled with tar the joints and he the cracks that flint may develop de elop the 1019 1919 report of tile the state commiss commissioner loner of highways of new york gives the overage average cost of maintenance for tile the three years eara 1915 1016 and 1017 1917 as follows macadam Maid dam per mile per year for the maintenance of 2408 miles gravel per mile per year bear for the maintenance of little first class concrete per mile per year the maintenance of miles |