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• The four smaller trucks spread their load over only six tires, whereas the larger, heavier <br />truck uses 10 tires. <br />• While it is true that the heavier axle loads produce significantly higher ESAL values at a <br />rate of approximately the 4th power rather than linearly, this is surmounted by the <br />additional tires and the fact that only a single vehicle's empty weight (albeit greater than <br />one of the four smaller vehicles) travels on the city street. <br />Raymond, City of Spokane, Washington, 2004 (18) <br />The City of Spokane, Washington, contracted with a consultant to evaluate the impacts of heavy <br />vehicles on the city streets. In contrast with the information presented in Table 2, developed by <br />the R3 Consulting Group and others (indicating that a loaded garbage truck can be equivalent to <br />up to 1,750 passenger cars, the paper developed by Raymond suggests that the same vehicles <br />could be equivalent to as many as 13,700 passenger cars. <br />The remainder of the paper is a general discussion of the impacts of heavy vehicles (and buses in <br />particular) on the streets of Spokane. <br />13 <br />