Abstract：
In the area of Solid Waste Management, transportation of the collected waste is a critical aspect considering the substantial time spent by garbage trucks on public roads. Studies have reported that transporting garbage has challenges related to public exposure and aesthetics. This study presents a generalised bi-objective formulation for the optimal routing of garbage trucks from transfer stations to recycling sites/landfills considering the trade-off between public exposure and aesthetic loss and constraining the operating cost. The formulation uses the novel link capacity function to account for the delay at traffic signals and the mix of trucks and cars on link performance. The proposed formulation is solved using the weighted sum and ε-constraint methods and applied to a realistic case study of the City of Chicago, USA. The Pareto Front obtained for the bi-objective formulation offers diverse trade-off solutions catering to distinct performance metrics. The results highlight the disparity across the solutions; the solution (P0.95 on Pareto Front) for minimum operating cost (or travel time or distance travelled) is very different from the solution (P0.4 on Pareto Front) for aesthetic cost and public exposure. The parametric study indicated that a modest operating budget may suffice for achieving aesthetic benefits, but minimising public exposure requires a higher operating budget. Finally, the proposed framework is adaptable to address various challenges pertaining to waste transportation, thereby serving as a valuable tool for evaluating policies and practices geared towards sustainability objectives.
摘要：
在固体废物管理领域，考虑到垃圾车在公共道路上花费的大量时间，收集的废物的运输是一个关键方面。研究报告说，运输垃圾具有与公众暴露和美学有关的挑战。这项研究提出了一个广义的双目标公式，用于考虑到公众暴露与美学损失之间的权衡以及限制运营成本，将垃圾车从转运站到回收地点/垃圾填埋场的最佳路线。该公式使用新颖的链路容量函数来考虑交通信号的延迟以及卡车和汽车对链路性能的混合。所提出的公式使用加权和和ε约束方法求解，并应用于芝加哥市的实际案例研究，美国。为双目标配方获得的ParetoFront提供了多种权衡解决方案，以适应不同的性能指标。结果突出了解决方案之间的差异；最小运营成本（或旅行时间或旅行距离）的解决方案（帕累托正面的P0.95）与美学成本和公众曝光的解决方案（帕累托正面的P0.4）大不相同。参数研究表明，适度的运营预算可能足以实现美学效益，但尽量减少公众曝光需要更高的运营预算。最后,拟议的框架适用于解决与废物运输有关的各种挑战，从而成为评估旨在实现可持续发展目标的政策和做法的宝贵工具。
