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Show i The search continues for a cheap paving material capable of withstanding withstand-ing the wear and tear (specially the tear) of automobiles. For the less used highways several fairly satisfactory satis-factory ways have been found to hold the broken stone in place, but in places where traffic is constant and fierce the problem is not so simple. In the Bronx 18 different kinds of pavement have been laid in the hope of finding something both lasting and cheap enough for ordinary roads. Some were found worthless, while others oth-ers have been standing the test thus far fairly well. An analysis of the bituminous binders used was made by the United States office of public roads, and levels were taken to ascertain ascer-tain the amount of wear. On main roads where traffic is heaviest it may prove cheapest in the long run to put in a permanent pavement of brick, wood blocks, or asphalt, but for highways high-ways at large the cost would be prohibitive, pro-hibitive, and a satisfactory binder Is still looked for. |