OCR Text |
Show Year-Round Surface For Low Cost Roads The United States Bureau of Public Pub-lic Roads, in cooperation with the asphalt as-phalt industry is to make an extensive exten-sive study of low-cost methods of oil-treating oil-treating hundreds of thousands of miles of gravel, sand-clay and top-soil top-soil roads all over the country. The traffic on these roads is such n.s t.n rermire a smooth, dlistless vear- round surface, but notg reat enough to justify costly high-type surfaces. A detailed analysis of the methods, materials, cost and service of the various var-ious types of low-cost surfaces thus far developed in various localities, wih be made. |