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AECOM <br />Pavement Management Loading Study <br />City of Santa Ana, California <br />RELATIVE LOADING IMPACT <br />Vehicle Type <br />Vehicle Load Factor <br />Passenger Car Equivalent <br />Passenger Car <br />0.0004 <br />1 <br />Delivery Truck (Typical Load) <br />0.19 <br />475 <br />Commercial Truck (Typical Load) <br />0.51 <br />1,300 <br />Street Sweeper <br />1.67 <br />4,200 <br />Transit Bus (50% Full) <br />2.26* <br />5,650 <br />School Bus <br />1.45* <br />3,600 <br />Recycling, Refuse Green Waste Truck <br />(Empty) <br />0.58 <br />1,450 <br />Recycling, Refuse Green Waste Truck <br />(Full) <br />4.34 <br />10,850 <br />Roll Off Truck (Empty) <br />0.65 <br />1,600 <br />Roll Off Truck (Full) <br />2.33 <br />5,800 <br />Commercial Waste Truck (Empty) <br />0.70 <br />1,750 <br />Commercial Waste Truck (Full) <br />1.61 <br />4,000 <br />"Vehicle Load Factor on Secondary and Collector Arterial <br />ASSUMPTIONS / LIMITATIONS <br />A terminal pavement serviceability (pt) = 2.5 was used for ESAL calculations. Serviceability <br />is a measure of pavement condition and terminal serviceability is the condition at which the <br />pavement is considered in need of a major rehabilitation or reconstruction. <br />Total traffic volumes were estimated for local streets. Total truck volumes and truck classes <br />were estimated for secondary/ collector arterials and local streets. Actual traffic and truck <br />classification counts would be required to verify the estimates. <br />The average of empty and full truck weights was used for calculating the pavement loading <br />impact of refuse, recycle, and green waste trucks. <br />The calculated pavement loading impacts are averages across all streets within a street <br />class. Individual streets may have more or less loadings than those calculated. <br />The tag axle on a waste hauling truck is an additional axle with two wheels that is used to <br />better distribute the truck's weight on the pavement and reduce the overall loading impact. <br />The tag axle is able to be raised and lowered by the operator. In discussion with Waste <br />Management of Orange County, we learned the tag axle is generally up on the residential <br />streets when the trash carts are being loaded. Then the tag axle is down when the loaded <br />truck travels to the waste collection site. For the loading calculations, we assumed the <br />typical truck operation has the tag axle in the up position when the trucks are empty and in <br />the down position when the trucks are loaded, with one exception. Based on Waste <br />AECOM Project No. 60477125 <br />Lm w • <br />June 21, 2016 <br />Page 4 of 11 <br />