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A Multi-Period Tradable Credit Scheme Incorporating Interest Rate and Traveler Value-of-Time Heterogeneity to Manage Traffic System Emissions

机译:结合利率和旅行者时间价值异质性的多期限可交易信贷计划,以管理交通系统排放

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This study focuses on a tradable credit scheme (TCS)-based multi-period equilibrium modeling framework to address the planning problem of a central authority which seeks to minimize the vehicular emissions in a traffic network over a planning horizon (PH). In this context, the multi-period TCS (MPTCS) equilibrium conditions consist of traffic and market equilibrium conditions. To develop an effective TCS design in practice, this study factors the heterogeneity in travelers' value of time (VOT) to enable realism in capturing the traffic equilibrium conditions, and the interest rate to reflect market realism. The VOT is an important factor in the route choice process as travelers tradeoff the credit consumption and travel time costs of each route. Further, travelers decide between selling or transferring unused credits across periods based on the dynamic interest rates over the PH as they can accrue interest by selling credits in the market. The study investigates the existence and uniqueness of multi-period equilibrium credit prices, aggregate link flows and travel demand rates. Then, the equilibrium credit prices under the MPTCS are analyzed and it is demonstrated that while credit price volatility increases with increasing interest rates, it can be dampened by the ability of travelers to transfer credits under the MPTCS. Finally, a system optimal (SO) MPTCS is designed to determine the TCS parameters (credit allocation and charging schemes) that minimize vehicular emissions in a traffic network over the PH. The study insights suggest that the SO design of MPTCS provides a capability to manage network vehicular emissions over the PH. Further, they suggest that if VOT is not factored, the TCS would be socially inequitable, and ignoring interest rates creates inefficiencies in achieving desired emissions levels.
机译:这项研究集中在基于可交易信贷计划(TCS)的多期均衡建模框架上,以解决中央主管部门的规划问题,该问题旨在最大程度地减少规划视野(PH)内交通网络中的车辆排放。在这种情况下,多时期TCS(MPTCS)平衡条件包括交通和市场平衡条件。为了在实践中开发有效的TCS设计,本研究考虑了旅行者时间价值(VOT)的异质性,以使现实能够捕获交通平衡条件,而利率则要反映市场现实。 VOT是路线选择过程中的重要因素,因为旅行者需要权衡每条路线的信用消费和旅行时间成本。此外,旅行者可以根据PH上的动态利率来决定在跨期间出售还是转移未使用的信用额之间,因为他们可以通过在市场上出售信用额来累积利息。该研究调查了多期均衡信贷价格,总链接流量和旅行需求率的存在和唯一性。然后,对MPTCS下的均衡信贷价格进行了分析,结果表明,虽然信贷价格的波动性随着利率的增加而增加,但可以被旅行者根据MPTCS转移信贷的能力所抑制。最后,设计了系统最佳(SO)MPTCS来确定TCS参数(信用分配和收费方案),以最小化PH上交通网络中的车辆排放。研究的见解表明,MPTCS的SO设计提供了管理PH上的网络车辆排放的功能。此外,他们建议,如果不考虑VOT,TCS在社会上将是不平等的,而忽略利率会导致实现所需排放水平的效率低下。

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