PROBLEM TO BE SOLVED: To calculate estimated travel time in respective zones easily, based on shortest travel time and occupancy.SOLUTION: A traffic signal control system estimates estimated travel time T from an A point on an upstream side of a road to a B point on a downstream side of the road, and displays the estimated travel time T which has been estimated on an information plate 10 installed in the vicinity of the A point being the uppermost point. Vehicle detectors 21-23 disposed on small zones D1-D3 respectively, are connected to a travel time estimation device 30 in a traffic management center C by wired connection or wireless connection. The travel time estimation device 30 calculates occupancy X in each small zone Dn and small zone estimated travel time Tn based on vehicle detection information inputted from the vehicle detectors 21-23. In calculation of the small zone estimated travel time Tn, the occupancy X of the vehicle detector in the small zone Dn is used as a variable in estimation processing, and a travel time estimation formula in which a sigmoid function is applied to the occupancy X, is used.
【課題】最短旅行時間と占有率に基づいて各区間の推定旅行時間を容易に算出できる。【解決手段】交通信号制御システムは道路の上流側のA地点から下流側のB地点までの推定旅行時間Tを推定し、最上流地点であるA地点近傍に設置した情報板10に、推定した推定旅行時間Tを表示する。小区間D1〜D3にそれぞれ配置した車両感知器21〜23は、有線又は無線により交通管制センターC内の旅行時間推定装置30に接続されている。旅行時間推定装置30は車両感知器21〜23から入力した車両感知情報に基づいて、小区間Dn毎の占有率X及び小区間推定旅行時間Tnを算出する。小区間推定旅行時間Tnの算出には、推定処理に小区間Dnにおける車両感知器の占有率Xを変数とし、この占有率Xにシグモイド関数を適用した旅行時間推定式を用いる。【選択図】図1
TRAVEL TIME ESTIMATION SYSTEM AND TRAVEL TIME ESTIMATION METHOD
旅行時間推定システム及び旅行時間推定方法
2015-12-17
Patent
Electronic Resource
Japanese
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