Driving Behavior of Motorcycles Affected by Buses on Urban Arterials
|關鍵字:||混合車流;機車;公車站;多項羅吉特模式;微觀車流;mixed traffic;motorcycle;bus stop;microscopic traffic flow;multinomial logit model|
由於近幾年攝影技術進步，蒐集市區道路的車流影像，取得原始資料相對容易得多，本研究將利用無人機進行空中拍攝，包含晨峰與中午時段且具國內市區道路代表性的台北市路段，共兩個方向，分別為兩小時完整週期的影片，涵蓋車流密度高、中之車流影像，配合點取車流軌跡軟體平台的開發(Lee et al., 2008b)，建立車輛軌跡的資料庫。
Motorcycle is one of the major transportation modes in Taiwan. It is an irreplaceable vehicle type with its high motility and convenience. As the rapid growth of the population and the quantity of motorcycles, more and more traffic problems are arising, especially on urban arterials. The conventional traffic theories were almost devoted to the traffic flow of passenger car, and studies about the characteristics and driving behavior of motorcycles was limited. However, the mixed traffic composed of buses, cars and motorcycles might be a complicated topic because of the erratic driving behavior of motorcyclists such as filtering, swerving, oblique following. The motorcyclists usually face the approaching bus when travelling on the curb lane near the bus stop. The driven route and the line of sight of motorcyclists are blocked by the buses which are characteristics with lower speed and larger volume. Therefore, the buses could cause a serious impact on the motorcyclists on urban arterials. Instead of following the buses conservatively, the motorcyclists would like to overtake the buses soon and leave it far away. For simplicity, the driving behavior of motorcycles affected by buses is worth discussing in depth; however, only little research has attempted to study the movement of motorcyclists in the past. Besides, the traffic simulation software was mainly developed in European and American countries. The simulated results are unable to present the properties of traffic in Taiwan realistically without considering the mixed traffic flow and non-lane-based movements. We collected traffic data using aerial videography by a multicopter, which could be used to capture images and videos of the road traffic. The data was collected on a selected site location in Taipei. After extracting the trajectories and types of vehicles from the video images, the database could be built for analysis. The goal of this study is to formulate the driving behavior of motorcycles which is affected by buses as a discrete choice model using multinomial logit model, considering the driving state of buses simultaneously. The staggered car following of motorcycles is also discussed in this study. It is found that the driving characteristics of motorcycles when following the buses have totally difference between on the road and near the bus stop. According to the results of proposed models, the value of parameters could be explained reasonably and represent the behavior of motorcyclists correctly. The calibrated models are implemented into a traffic simulation model, Bikesim, to examine the performances of the models as compared to the real data. Our simulation results confirm that the proposed approach could reproduce the movements of motorcycles near a bus stop.
|Appears in Collections:||Thesis|