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Figure 4-2 Fuel Economy Versus Distance <br />i:� <br />2.8 <br />2.6 <br />2.4 <br />2.2 <br />E <br />c 2.0 <br />O <br />v <br />W 1.8 <br />Z <br />W <br />o o o o 0 0 0 0 0 0 o O o o o o o o O O o o O o <br />00 N CO O V 00 N CO O V 00 N W O It 00 N CO O V 00 N Cfl O <br />N N N M M I, V V Cn In (O C0 C0 1-- I- Co Co Co O O O <br />Distance Intervals (feet) <br />Note that the fuel economy decreases as the distance increases until a distance of 220 feet are <br />traveled. After 220 feet, the fuel economy increases. At 660 feet, the fuel economy is calculated <br />to be 2.77 miles per gallon (mpg). For distances between households greater than 660 feet, the <br />fuel consumption rate is assumed to be constant at 2.77 mpg. Driving conditions in urban <br />settings require the vehicle to maintain a speed slow enough to assure safety to the public and <br />requires stopping, turning corners and consideration for the ambient traffic at frequent intervals. <br />Optimum fuel economies are not achieved under these conditions. Highway or freeway travel <br />would afford better fuel economy, however for purposes of this report, the on route fuel <br />consumption efficiencies have been calculated from the field trials. The focus of this analysis is <br />on fuel consumption during actual collection activity, not driving from the truck base to the route <br />or from the route to the disposal location. <br />4.9.3 Field Observations <br />A Foth representative visited the in-depth cities. After contacting the hauling companies that <br />operate in these cities, the Foth representative met the drivers on their routes. Once contact with <br />the hauler was made, the starting mileage was noted and the collection vehicle was followed <br />through the collection areas. While monitoring the collection activities, total household counts <br />and the number of those serviced were gathered. Whenever there was a change in the <br />neighborhood/area or the truck left an area for another area of the city, the data collection <br />process was repeated. After collecting the actual distances and household counts for a particular <br />110 •Foth Infrastructure & Environment, LLC R - Analysis of Waste Collection Service Arrangements.doc <br />June 2009 <br />