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dc.contributor.author Withana, S
dc.contributor.author Perera, L
dc.contributor.author Bandara, S
dc.contributor.editor Perera, HLK
dc.date.accessioned 2022-05-28T08:19:10Z
dc.date.available 2022-05-28T08:19:10Z
dc.date.issued 2021-10
dc.identifier.citation Withana, S., Perera, L., & Bandara, S. (2021). Development of decision framework for dynamic signal timing design [Abstract]. In H.L.K. Perera (Ed.), Proceedings of the Transportation Research Forum 2021 (p. 16). Department of Civil Engineering, University of Moratuwa. en_US
dc.identifier.uri http://dl.lib.uom.lk/handle/123/18006
dc.description.abstract The traditional fixed time traffic signal systems use a static signal timing or in other words, a pre designed signal timing developed based on past traffic data. The signal timing design assumes the traffic levels to be similar for a given time period, but the traffic levels are highly fluctuating and dynamic in reality. Therefore, the next step in traffic signal timing designs is the dynamic designs where the timing will be varied in real time. This type of signal time designs will be mainly used in Adaptive Traffic Signal Systems which are designed to operate using real time information. A dynamic signal timing design requires a decision framework for real time operations and information management. Therefore, this study is aimed at development of a decision framework to minimize the delay time and to maximize the traffic flow in an intersection under unsaturated conditions. Analyzing many parameters used in literature, two main parameters were considered in this study, namely, critical lane flow and stop delay. Impact from pedestrians are incorporated by using the pedestrian delay time. The behavioural patterns identified in the individual parameters, when releasing traffic during the green time period in an intersection, was used to develop the framework. The behaviours of individual parameters in real scenarios were shown deviated results from theoretical studies mainly due to mixed traffic conditions. Motorcycles have contributed significantly for such deviation and as well as the capacity of the intersection. The decision framework was developed by integrating the individual parameters and their limits to communicate among phases in the traffic cycle. The cycle time was kept as a variable in the decision framework. This decision framework was simulated using PTV VISSIM software to observe unsaturated conditions in Piliyandala- Maharagama bypass Junction as a case study. The simulation results were obtained for different unsaturated flow conditions. They were in line with the expected outcomes. The flow through the intersection was slightly increased and average delay time was reduced slightly en_US
dc.language.iso en en_US
dc.publisher Department of Civil Engineering, University of Moratuwa en_US
dc.subject Dynamic signal timing en_US
dc.subject Signal design en_US
dc.subject Adaptive traffic control system en_US
dc.subject Traffic flow en_US
dc.title Development of decision framework for dynamic signal timing design en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Civil Engineering en_US
dc.identifier.year 2021 en_US
dc.identifier.conference Transport Research Forum 2021 en_US
dc.identifier.place Katubedda en_US
dc.identifier.pgnos p. 16 en_US
dc.identifier.proceeding Proceedings of the Transport Research Forum 2021 en_US
dc.identifier.email sudaracw47@gmail.com en_US
dc.identifier.email loshakap@uom.lk en_US
dc.identifier.email bandara@uom.lk en_US


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