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2009-09-22_PWETC_AgendaPacket
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2009-09-22_PWETC_AgendaPacket
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Commission/Committee
Commission/Authority Name
Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
9/22/2009
Commission/Committee - Meeting Type
Regular
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Review of Trash <br />As shown, residential trash trucks have an estimated impact Collection <br />equivalent to approximately 1,300 passenger cars. This is <br />comparable to the findings of other studies that we have m acts <br />conducted as well as that reported by various independent third p <br />parties {Appendix C). The impact of recycling trucks is much less <br />but still significant, and roughly equivalent to the impact of local <br />delivery trucksz3. One point to note is that the impact of large <br />delivery trucks (3 or more axles) is approximately two-thirds that of <br />local delivery trucks {2-axle 1 6 Tire Trucks} based on the sample <br />population. This tends to support the positive benefit additional <br />axles can have on lowering overall vehicle impacts. <br />In reviewing this comparison it is important to note that the <br />impacts shown are based on a random sampling of vehicles. <br />There can be wide variability of impacts within the general vehicle <br />types noted. As an example a larger local delivery truck hauling <br />construction materials, heavy furni#ure or food supplies may have <br />a significantly greater impact than a smaller local delivery truck <br />hauling overnight packages. <br />impact of Overloaded Vehicles <br />Background 1 Overview <br />The impact that a vehicle exerts on a section of pavement is <br />related to the vehicle's axle weights. As axle weight increases the <br />impact increases at a rate much greater than proportionally. As <br />such, overweight vehicles exert a significantly greater pavement <br />maintenance impact than that same vehicle at or below its legal <br />weight, in addi#ion to presenting a potential safety hazard. <br />Analysis <br />A trash truck operating at one {1) ton over a legal payload of 10 <br />tons {10% overweight) exerts an impact approxima#ely 50% more <br />than a vehicle loaded to i#s legal weight. That same vehicle <br />operating at two (2} tons (20% overweight} over its legal payload <br />exerts an impact approximately 100% higher than when loaded to <br />its legal weight24. <br />The fact that the Larimer County Landfill, and certain other <br />neighboring landfills, do not have scales and charge haulers <br />based on volume presents a potential incentive for haulers to <br />maximize vehicle payloads. This may foster the overloading of <br />vehicles. While this poten#ial may exist, it does not necessarily <br />zs Qur projection of recycling truck impacts is based on the smaller nan- <br />compacting vehicles that two of the haulers are currently using. It is <br />certainly conceivable that larger compacting vehicles could be used for <br />collection of single stream recyclables in the future with a much larger <br />associated impact. <br />2a Source: AASHTO Guide for ©esign of Pavement Structures. <br />Section 2 - 21 <br />
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