Integrated adaptive-signal dynamic-speed control of signalized arterials
Integrated adaptive-signal dynamic-speed control of signalized arterials
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DOI：
10.1061/(asce)0733-947x(2002)128:5(447
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发表时间：
2002-09-01
期刊：
影响因子：
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通讯作者：
Abu-Lebdeh, G
中科院分区：
文献类型：
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作者：
Abu-Lebdeh, G
本文论证了在智能交通系统（ITS）环境中，对拥挤的城市干道进行交通控制的先进概念的可行性。新概念的核心思想是将动态自适应信号的能力与动态优化的随时间变化的速度相结合。在这种控制下，速度将自动优化，并由中央计算机与其他信号控制参数并行设置。速度和信号控制参数将在链路之间和随时间变化，以响应变化的交通状况。司机将遵循优化的速度，因为他们进入一个链接。一旦为链路设置了最佳速度，它将保持恒定，直到控制周期结束。链路速度将仅在每个控制周期结束时更新。控制周期的长度可以随着系统条件的发展而改变。新的控制概念进行了测试，在一个拥挤的动脉与多个链接。动脉系统被建模为离散事件时变动态系统，控制周期跨越几个周期。系统的吞吐量最大化的关键运营措施，如交叉口堵塞，排队溢出，和其他相关的交通运营措施。遗传算法被用作优化工具。结果表明，所提出的控制概念将显着改善交通流。新的控制概念是适合在线实施的ITS设置。
This paper demonstrates the feasibility of an advanced concept of traffic control for congested urban arterials in an intelligent transportation system (ITS) setting. The core idea of the new concept is to integrate the capability of dynamic adaptive signals with dynamically optimized time-dependent variable speed. Under such control, speeds would be automatically optimized and set by a central computer in parallel with the other signal control parameters. Speed and signal control parameters would change between links and over time, in response to changing traffic conditions. Drivers would follow the optimized speed as they enter a link. Once an optimal speed has been set for a link, it remains constant until the control cycle ends, Link speeds would be updated only at the end of every control cycle. The control cycle may change in length as system conditions evolve. The new control concept was tested on a congested arterial with multiple links. The arterial system was modeled as a discrete event time varying dynamic system with a control period spanning several cycles. System throughput was maximized subject to such critical operational measures as intersection blockage, queue spillbacks, and other relevant traffic operation measures. Genetic algorithms were used as an optimization tool. Results show that the proposed control concept will significantly improve traffic flow. The new control concept is suitable for on-line implementation in an ITS setting.