Good roads . ^ great cost of this material, and the low cost of main-tenance due to light traffic, has led to the use of ordinary fieldstone or the boulders from river beds prepared in crusherstemporarily set up along the line of working. It is not unlikelythat some of these experiments with the local varieties of rock MA SSA CHUSE TTS HIGH IVA Y COMMISSION. 7 7. I^AYiNG Macadam on an Earth Foundation. may prove to have been ill advised, but as tlie expense of con-structing may often be reduced to the amount of one-half bvthe use of field or river boulders, instead of the trap-rock, ithas seem
Good roads . ^ great cost of this material, and the low cost of main-tenance due to light traffic, has led to the use of ordinary fieldstone or the boulders from river beds prepared in crusherstemporarily set up along the line of working. It is not unlikelythat some of these experiments with the local varieties of rock MA SSA CHUSE TTS HIGH IVA Y COMMISSION. 7 7. I^AYiNG Macadam on an Earth Foundation. may prove to have been ill advised, but as tlie expense of con-structing may often be reduced to the amount of one-half bvthe use of field or river boulders, instead of the trap-rock, ithas seemed worth while to take the risk. Where the localmaterials thus used do not turn out to be economically service-able, the mistake may be remedied by surfacing the way with athin coating of the costlier material, or by searching out somedeposit of dyke stone which may exist in the imniediateneighborhood. As will be noted below, none such undiscovered trap deposits evidently exist in this State. In the case of the Hingham road a contract has been madefor the surfacing of the way with a variety of gravel which hasalready been tested for such use. The cost of a road made ofthis material is considerably less than that of a broken stonepavement made under the same local conditions. The expenseof repairs has yet to be determined. They may possibly besomewhat grea
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectroads, bookyear1892
