1 AIT Asian Institute of Technology

Traffic flow characteristics at u-turn sections of a highway in Bangkok

AuthorEbisawa, Ryoichi
Call NumberAIT Thesis no.TE-97-02
Subject(s)Traffic flow--Thailand--Bangkok

NoteA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering
PublisherAsian Institute of Technology
AbstractThis study presents gap acceptance behaviors at a U-turn section in Bangkok. A traffic data was collected at an intersection for six hours using video camera. A discrete choice modeling was applied for predicting the gap acceptance probability. The logit model was used for the probability function. Total thirteen factors were selected to evaluate the effects for drivers' maneuver. The models were estimated for U-turn motorcycle, vehicle, and all vehicles. This made it possible to quantify the characteristics for different type of vehicles. The result shows that all models had high goodness of fit. Waiting time, the number of rejected gap, gap, speed, acceleration and queuing before arriving the head ofU-turn lane have significant impacts on the probability of a given gap being accepted. The influence of type of on-coming vehicle, driving lane of on-coming vehicle, existence of right turning vehicle was significant in some cases but not in the other cases. Finally, a model was proposed to estimate the gap acceptance probability.
Year1998
TypeThesis
SchoolSchool of Civil Engineering
DepartmentDepartment of Civil and Infrastucture Engineering (DCIE)
Academic Program/FoSTransportation Engineering (TE)
Chairperson(s)Nakatsuji, Takashi;
Examination Committee(s)Yordpol Tanaboriboon;Charoenngam Chotchai;
DegreeThesis (M.Eng.) - Asian Institute of Technology, 1998


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