The Speed-Density Relationship in Heterogeneous Traffic Containing Pedestrians Bicycles and Powered Two-Wheelers

  • 陳 柔涵

Student thesis: Master's Thesis


Local streets traffic speed control in residential areas or commercial areas require attention in the planning and design stages With the increase of various kinds of automobile transportation modes mixed traffic context which contains motorized and non-motorized vehicles has not been uncommon to be seen nowadays As the street users such as pedestrians bicycles and powered two-wheelers have total different kinematic characteristics they might cause huge disturbance to each other in the traffic The aim of this study is to investigate the speed profile under different density group in heterogeneous traffic in local streets To conduct this study the trajectories of the street users in local streets were observed in a two-dimensional and microscopic manner Data were collected at a food street near a university in Tainan Different dimensions of virtual lane by various types of street users were found to establish the speed-density models Models were able to depict the speed profile properly The models to describe the relationship between the speed and the density were established to reflect the speed profiles of the street users in mixed traffic The results show that the local street surrounding with food shops provided a luxurious atmosphere where people moved at their own speeds and directions Low speeds occur frequently under low density Also bicycles are the most competitive traffic mode in this environment with their flexibility easily weaving in and out in the traffic flow The results provide basic knowledge for local street design in traffic control
Date of Award2017 Jan 13
Original languageEnglish
SupervisorTzu-Chang Lee (Supervisor)

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