Official Proceedings of the Annual Convention Volume 22

Official Proceedings of the Annual Convention Volume 22

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: classify separately the motors differing greatly in weight. Another factor, however, which admittedly is large in the effect produced is that of speed, and sufficient consideration in the traffic records to date does not seem to have been given to this factor, while possibly too much of an attempt has been made to refine the traffic records, rather unnecessarily in some cases, by establishing too many classes for the motor traffic. It is quite likely that such a classification embracing a. Runabouts, light touring cars, and light delivery wagons; b. Taxicabs, heavy touring cars, limousines; c. Drays, busses and trucks; (all with rubber tires) would be sufficient. These could be counted separately, their average weight and speed estimated, and their momentum (the basis for the effect in each case) could then be calculated with sufficient accuracy. l/Iost of the discussions, so far published, on the effects of traffic, seem to the writer to have neglected to an unfortunate extent this matter of the speed of traffic, and some highway oflicials have gone so far as to state definitely, bases for the comparison of traffic which they say are "excellent" or "satisfactory," and which are simply the result of the calculation of the tonnage per mile, or per yard or foot of width, but which do not take into account at all, the speed of transportation. It will not be denied by experienced highway authorities that the speed of motor traffic has an important bearing on the effect of such traffic. A ten ton load propelled at a rate of five or six miles per hour produces mainly an effect of compression or toward vertical displacement. The same load propelled at 15 miles per hour sets up horizontal strains of considerable more

Product details

  • Paperback | 196 pages
  • 189 x 246 x 11mm | 358g
  • United States
  • English
  • black & white illustrations
  • 1236841417
  • 9781236841414