| Summary: | 碩士 === 逢甲大學 === 運輸科技與管理學系 === 101 === If the passenger car equivalent settings (large vehicle equals to 1.5 PCE; passenger car equals to 1 PCE; motorcycle equals to 0.3 PCE) of general practice is assumed for urban timing plan, there may be discrepancies between the simulated flow and real traffic flow. Especially the influence of the number of motorcycles may be biased. Due to high ownership of private vehicles, dense population, and limited GDP (Gross Domestic Product) in Taiwan, the number of motorcycles on the road are higher than that of other countries. In mixed traffic lanes, how motorcycles stop or wait for entering intersections in front of cars, and how motorcycles affect movement of traffic flow is an important issue.
Through observation and investigation, this study obtained data within research scope, and made the assumptions of “no vehicle moves before red light turns green”, “the queue clearing time of fast lane and that of mixed traffic lane can be compared to estimate the PCE value of motorcycle in mixed traffic lanes”, “when the first car waiting in the mixed traffic lane arrives at the stop line, it means that the motorcycles in front of the car have been all cleared”, “the motorcycles behind or alongside the first car waiting in the mixed traffic lane have no impact on the queue clearing of the cars”, “vehicle queue clearing time has linear relation with PCE value”, and “The influence of vehicle lane changing behavior during the queue clearing process is not considered.”.
This study then used most of samples in calibration process to explore the correlation between the number of motorcycles and queue clearing time, and calibrated the PCE value for motorcycle. Moreover, this study used remaining samples in validation process by using relative difference percent method. Finally, according to the research findings, the PCE value for the intersection of Taiwan Boulevard and Wenxin Road is in the range of 0.25~0.27, and the relative difference percent value is in the range of 14%~20%, which is a reasonable prediction. The PCE value for the intersection of Taiwan Boulevard and Dadung Road is in the range of 0.28~0.63, and the relative difference percent value is in the range of 8%~24%, which is also a reasonable prediction.
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