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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/3109

    Title: 都市地區過飽和車流環境下之全動態交控策略開發研究
    Authors: 何志宏
    Keywords: 過飽和交通狀況
    Oversaturated Traffic Condition
    Traffic-adaptive Signal Control
    Traffic Simulation Analysis
    Intersection Capacity Utility
    Date: 2008-10-31
    Issue Date: 2009-08-13 20:39:08 (UTC+8)
    Abstract: 國內都會地區的道路交通近年來常因過多的汽、機車於上、下班交通尖峰時段湧至容量有限的市區道路上,而使都市中心的交通要道經常處於過飽和的交通狀況,從而造成用路人的通勤時間大幅增加,而因交通壅塞所導致的時間及社會成本損失更是難以估計;因此本研究乃冀求本於智慧型運輸系統(ITS)內先進交通管理系統(ATMS)的理念,採用全動態號誌控制策略試圖改善此一常見卻棘手的都市交通擁擠問題。為求建構出一套符合過飽和交通情境的完整都市路網,本研究首先定義可資代表飽和與過飽和交通情境的五種旅次水準,繼而設定一套時比相同之基本定時時制,作為傳統定時時制策略的代表以及求取最佳化定時時制的依據;再納入經過多年發展的國產COMDYCS-Ⅲ全動態號誌控制模式,作為交控績效相互評估比較之基礎。在獲取路網最佳化定時時制方面,本研究係採用國際上常用之知名號誌時制設計軟體SYNCHRO 來產製路網各種飽和與過飽和交通情境下的定時最佳化時制;而全動態號誌控制策略的引用係將COMDYCS-Ⅲ全動態號誌控制模式,先改良其路段車流之先期交通車流資訊長度,使全動態交控模式可以同時獲得更多臨近路段的交通資訊,因而可在極短的時間內作出更為準確的時制控制決策。根據本研究的模擬實驗分析結果顯示,經過改良後的COMDYCS-Ⅲ全動態號誌控制模式的確可以在都市過飽和路網中,較傳統的定時時制策略和最佳化定時時制顯著地降低整體路網車流的平均旅行時間及平均停等時間,且在路口容量使用率(Intersection Capacity Utility,ICU)指標上更能展現出紓解過飽和車流的能力,故此證明全動態號誌控制模式在改善過飽和路網的交通壅塞程度以及提升路網旅次通行效率上面,確實有其獨特的優異性。In Taiwan, traffic congestion is usually occurred at traffic peak hour because ofexcess traffic demands. If the congestions can not be improved, oversaturatedsituation will probably be happen, and road users have to take more times to passthe oversaturated areas. To solve the traffic congestion problem, traffic-adaptivesignal control strategy is then appeared which is one strategy of the AdvancedTraffic Management Systems (ATMS) in the current Intelligent TransportationSystems (ITS) times.To establish an oversaturated area, this research defines 5 levels of traffic IIIdemandwhich included near-saturated, saturated and oversaturated trafficconditions. Three signal control strategies are to be discussed. The optimal signaltiming designs is provided by using SYNCHRO, and a pre-timed signal controlstrategy, which to be a comparison strategy, use the same cycle and offset but thetwo phase splits set equal. The traffic-adaptive signal control strategy used in thisresearch is a model based on a mature and worked model in Taiwan. It improvesthe range of traffic flow information and the model can have enough data tooptimize the signal timing plan for a short near future periodAccording to the results of experiment, the traffic-adaptive signal controlstrategy can achieve the objectives such as minimum stopped time and minimumdelays. Besides, the Intersection Capacity Utility (ICU) shows that the road usecan more efficiently by using traffic-adaptive signal control strategy. It can beproven that traffic-adaptive signal control strategy has the ability to not onlyimprove the oversaturated traffic conditions and traffic congestion problem butalso raise the transport capacities in the oversaturated area.
    Appears in Collections:[房地產開發與管理系所] 研究計畫

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