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MEe ®M Pavement Management Loading Study <br />City of Santa Ana, California <br />The concept of Vehicle Load Factors (VLF) was used to facilitate loading calculations. The <br />VLF is the total ESAL value for a specific bus or truck for each pass of the vehicle. Specific <br />axle weights were obtained for the selected buses and trucks. The ESALs for each axle <br />were calculated using the axle load equivalency tables from the 1993 AASHTO Design <br />Guide. The ESALs for all axles on each vehicle were then summed to obtain the VLF. <br />The weekly loading impacts for the specific evaluated buses and trucks were calculated in a <br />different manner than the loading impacts for the rest of the trucks on the street. The VLF for <br />each evaluated bus and truck was multiplied by the weekly trips to obtain the total weekly <br />loading impact. Specific axle weights vary considerably for the rest of the trucks, making it <br />necessary to use CalTrans ESAL constants developed for various truck types. Note, while <br />useful for this evaluation, these ESAL constants are time dependent so they are not directly <br />comparable to the VLF. Weekly ESAL constants were calculated for the rest of the trucks <br />and multiplied times the ADT to obtain the total weekly loading impact. <br />FINDINGS <br />The results of the loading impact calculations are listed below for each of the street classes <br />and pavement types. <br />Asphaltic Concrete Pavements <br />MAJOR ARTERIALS <br />Vehicle <br />Weekly <br />Total <br />Vehicle <br />Total Weekly <br />Percent <br />Vehicle Type <br />Load <br />Total <br />Loading <br />Operator <br />Loading Impact <br />Loading Impact <br />Factor <br />Trips <br />Impact <br />Passenger <br />0.0004 <br />209,300 <br />83.7 <br />2.0 <br />2.0 <br />Cars <br />Delivery Trucks <br />2 -axle <br />0.19 <br />7,840 <br />1,486.2 <br />35.3 <br />35.3 <br />3 -axle <br />0.51 <br />630 <br />318.5 <br />7.6 <br />Commercial------------------------------ <br />4_axle <br />0,81 <br />--------------------------------- <br />840---- <br />678.5---- <br />--------------- ----- <br />33.3 <br />Trucks <br />------ ----- <br />---- ---- <br />-- <br />- - - - -- - -- <br />-------1.62-------- <br />5 +axle <br />1.89 <br />210 <br />397.5 <br />9.5 <br />City Utility/ Street <br />Sweeper <br />1.63 <br />1 <br />2.0 <br />0.0 <br />0.0 <br />Sweeping <br />OCTA <br />Transit Bus <br />6.04 <br />180 <br />1,087.2 <br />25.9 <br />25.9 <br />SAUSD <br />School Bus <br />1.45 <br />16 <br />23.2 <br />0.6 <br />0.6 <br />Recycling <br />1.06 <br />10 <br />10.6 <br />0.3 <br />Refuse <br />1.06 <br />10 <br />10.6 <br />0.3 <br />Waste <br />Green Waste <br />1.06 <br />10 <br />10.6 <br />0.3 <br />2.9 <br />Management <br />Roll Off <br />1.46 <br />1 50 <br />73.0 <br />1.7 <br />Commercial <br />1.12 <br />1 10 <br />11.2 <br />0.3 <br />Totals <br />4,192.8 <br />100 <br />100 <br />AECOM Project No. 60477125 <br />65B -10 <br />June 21, 2016 <br />Page 6 of 11 <br />