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首页> 外文期刊>Transportation Research Part B: Methodological >Optimal location of advance warning for mandatory lane change near a two-lane highway off-ramp
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Optimal location of advance warning for mandatory lane change near a two-lane highway off-ramp

机译：在两车道高速公路匝道附近强制换道的预警系统的最佳位置

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Improper mandatory lane change (MLC) maneuvers in the vicinity of highway off-ramp will jeopardize traffic efficiency and safety. Providing an advance warning for lane change necessity is one of the efficient methods to perform systematic lane change management, which encourages smooth MLC maneuvers occurring at proper locations to, mitigate the negative effects of MLC maneuvers on traffic flow nearby off-ramp. However, the state of the art indicates the lack of rigorous methods to optimally locate this advance warning so that the maximum benefit can be obtained. This research is motivated to address this gap. Specifically, the proposed approach considers that the area downstream of the advance warning includes two zones: (i) the green zone whose traffic ensures safe and smooth lane changes without speed deceleration (S-MLC); the start point of the green zone corresponding to the location of the advance warning; (ii) the yellow zone whose traffic leads to rush lane change maneuvers with speed deceleration (D-MLC). An optimization model is proposed to search for the optimal green and yellow zones. Traffic flow theory such as Greenshield model and shock wave analysis are used to analyze the impacts of the S-MLC and D-MLC maneuvers on the traffic delay. A grid search algorithm is applied to solve the optimization model. Numerical experiments conducted on the simulation model developed in Paramics 6.9.3 indicate that the proposed optimization model can identify the optimal location to set the advance MLC warning nearby an off-ramp so that the traffic delay resulting from lane change maneuvers is minimized, and the corresponding capacity drop and traffic oscillation can be efficiently mitigated. Moreover, the experiments validated the consistency of the green and yellow zones obtained in the simulation traffic flow and from the optimization model for a given optimally located MLC advance warning under various traffic regimes. The proposed approach can be implemented by roadside mobile warning facility or on-board GPS for human-driven vehicles, or embedded into lane change aid systems to serve connected and automated vehicles. Thus it will greatly contribute to both literature and engineering practice in lane change management. (C) 2015 Elsevier Ltd. All rights reserved.
机译：在高速公路匝道附近实施不当的强制性车道变更（MLC）操作将危害交通效率和安全性。为变道的必要性提供预警是执行系统化变道管理的有效方法之一，该方法鼓励在适当位置进行平滑的MLC机动，以减轻MLC机动对匝道附近交通流量的负面影响。但是，现有技术表明缺乏严格的方法来最佳地定位该预先警告，从而可以获得最大的收益。本研究旨在解决这一差距。具体而言，所提出的方法认为提前警告的下游区域包括两个区域：（i）绿色区域，其交通确保安全且平稳的车道变化而不会减速（S-MLC）；与预先警告的位置相对应的绿色区域的起点； （ii）黄色区域，其交通导致带速减速的紧急换道动作（D-MLC）。提出了一种优化模型，以寻找最佳的绿色和黄色区域。利用Greenshield模型和冲击波分析等交通流理论，分析了S-MLC和D-MLC操作对交通延误的影响。应用网格搜索算法求解优化模型。对在Paramics 6.9.3中开发的仿真模型进行的数值实验表明，所提出的优化模型可以确定最佳位置，以在靠近匝道的地方设置提前MLC警告，从而将因换道操作而导致的交通延误降至最低，并且相应的容量下降和流量振荡可以得到有效缓解。此外，实验验证了在各种交通状况下，模拟交通流量和针对给定最佳位置的MLC预警系统从优化模型获得的绿色和黄色区域的一致性。所提出的方法可以通过路边移动预警设施或用于人类驾驶车辆的车载GPS来实现，也可以嵌入车道变更辅助系统中，以为联网和自动驾驶的车辆提供服务。因此，它将为车道变更管理中的文献和工程实践做出巨大贡献。 （C）2015 Elsevier Ltd.保留所有权利。

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