Title: OPTIMISATION CRITERIA FOR CONTROLLING ROAD TRAFFIC USING TRAFFIC SIGNALS
Abstract: THE VARIOUS CONCEPTS CONTAINED IN THE TERM AS USED IN LITERATURE IN THE FIELD OF TRAFFIC SIGNAL CONTROL ARE SUMMARISED, DESCRIBED AND COMPARED. IT IS ACKNOWLEDGED THAT IT IS IMPOSSIBLE TO ESTABLISH A FAVOURABLE CRITERION, SINCE THE QUALITATIVE FAVOURABLE CANNOT BE TRANSLATED OBJECTIVELY INTO AN UNAMBIGUOUS QUANTITATIVE FORM. RECOGNITION OF THIS HAS LED IN THE PAST TO SEVERAL ATTEMPTS TO COMBINE VARIOUS BASIC OBJECTIVES (E.G. MINIMISATION OF WAITING TIME AND OF THE NUMBER OF STOPS ETC) INTO A SIMPLE, NEW, MORE COMPLEX CRITERION USING LINEAR COMBINATIONS. SINCE IT WAS SHOWN THAT THE INDIVIDUAL COMPONENTS REACHED THEIR OPTIMUM AT ABOUT THE SAME VALUES OF THE CONTROL PARAMETERS (CYCLE TIME, GREEN TIME DISTRIBUTION, GREEN TIME WASTE), I.E. WERE STOCHASTICALLY (ACCORDING TO CONSTRUCTIONAL AND TRAFFIC FACTORS) MORE OR LESS GREATLY DEPENDENT UPON ONE ANOTHER, SUCH A COMBINATION SEEMS IN GENERAL TO BE UNNECESSARY. THE MOST PRACTICAL AND THE MOST USEFUL CRITERION FOR THE WIDEST RANGE OF SITUATIONS HAS PROVEN TO DATE TO BE THE MINIMISATION OF WAITING TIMES. TO THIS END, BOUNDARY CONDITIONS RELATING SPECIFICALLY TO THE AREA TO BE CONTROLLED (INDIVIDUAL JUNCTIONS, TRAFFIC JAMS, NETWORKS) MUST BE TAKEN INTO CONSIDERATION. IN CONCLUSION IT IS RECOMMENDED THAT THIS CRITERION BE STANDARDISED, WITH THE CONDITION THAT SUCH BOUNDARY CONDITIONS BE CONSIDERED.
Publication Year: 1975
Publication Date: 1975-01-01
Language: en
Type: article
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