Title Capacity and Service Analysis of Exclusive Motorcycle Lanes, Urban Bus Transit Facilities, and Urban Arterials (2/3)
Dept Transportation Planning and Land Transport Division
Year 2010
Month
Price
Summary The Institute of Transportation, Ministry of Transportation and Communications, initiated a 3-year project in 2007 to revise Chapters 16, 17, and 18 of the 2001 Taiwan Area Highway Capacity Manual(HCM). This study is the second phase of the project and its primary purpose is to revise Chapter 16 for the analysis of urban arterials. To support future effort in revising the HCM, this study also collects data on the speed-flow relationship of a rural two-lane highway (County Route 151) and the dwell time characteristics of urban transit buses. The tasks that were carried out to revise Chapter 16 include the collection of data concerning urban flow characteristics, the use of field data to calibrate Highway Traffic Systems Simulation (HTSS) model, the establishment of level-of-service criteria, and the development of analysis framework and method. The revised Chapter 16 expands the subjects of analysis by covering not just arterials but also intersections, streets, and street networks. It reduces the nine classes of urban arterials described in the 2001 HCM to three based on speed limit (50, 60, or 70 km/h). Average Stopped delay and average travel speed are the respective measures of effectiveness for assessing the levels of service of individual intersections and those of streets. Because of a lack of reliable analytical models, the analysis of urban streets and intersections has to rely on the HTSS model. Regarding two-lane rural highways, field data show that their capacities are at least 1,500 pcphpl. Additional investigations are needed to obtain a better understanding of the real capacities. The data collection on bus transit has just begun and will be expanded and completed in 2009. Current data show that, after a bus comes to a stop at a bus stop, it takes an average of about 1.5 s to 2.9 s for the first passenger to either get on board or get off. These field data will be referenced for revision on Chapter 17 in next year.
Post date 2010/10/27
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