Public Transport Capacity Analysis Procedures for Developing Cities
Rail Capacity Introduction
Download 2.52 Mb.
|
- Navigate this page:
- Operating Experience
- Design Considerations
- Overview of Procedures
Rail CapacityIntroductionRail rapid transit systems provide important public transportation service in very large cities in developing countries. Trains operate along rights-of-way that are completely separated from street traffic interference. They carry large numbers of people safely and reliably. Train control signal systems govern train operations and capacities. This chapter provides guidance for computing the capacities of rail lines and stations. It overviews existing operational experience, identifies the key design and operating factors and sets forth procedures for estimating capacities in terms of trains per track per hour, passengers per track per hour and station platforms and access to them. Operating ExperienceMost rail rapid transit systems throughout the world schedule 25 to 30 trains per hour track per hour (2 to 2.5 minute headways). A few systems, however, operate at shorter intervals. They are found in Sao Paulo and Mexico City as well in Hong Kong and Paris. These systems operate single lines without any branching. Most rail rapid transit systems throughout the world schedule 25 to 30 trains per hour track per hour (2 to 2.5 minute headways). A few systems, however, operate at shorter intervals. They are found in Sao Paulo and Mexico City as well in Hong Kong, Tokyo, Moscow and Paris. These systems operate single lines without any branching. Some reported peak rush hour passenger volumes are given in Table 4 -31. The highest volumes, from 60,000 to over 80,000 passengers per track per hour, are found on lines in Sao Paulo and Hong Kong. Design ConsiderationsRail transit capacity concepts are similar to those in bus transit in several respects. Essentially, the running way capacity of a system measured in vehicles per hour is constrained by the occupancy of the critical station along a route – the one with the highest combination of mean and standard deviation6. While there are no on-street intersections in grade separated rail systems, other operational and design features such as terminals and junctions also limit capacity. Further, with generally larger volumes and either elevated or subterranean operation, level changing devices and platforms have a larger influence on system capacity than they do in bus systems. Table 4‑31 Hourly Passenger Volume of Rail Transit Systems in the Developing World
Listed below are the various aspects of transit capacity that are subsequently discussed. Running way capacity including the role of safe separation distance, signal/control systems and turnarounds. Platform capacity including allowance for circulation, waiting space, number size and location of platform ingress/egress channels Facility access elements including doorway and corridor widths, turnstiles and other barrier gates Fare collection systems including staffed fare booths and ticket vending machines Level changing systems including capacity of elevators, escalators and stairs Vehicle design elements including consist lengths and configuration (discrete vehicles or open-vestibule for entire train), interior configuration, doorway number, locations and widths. Overview of ProceduresTable 4 -32 and 4.3 illustrate procedures for assessing the capacity of existing and proposed rail transit lines respectively. These tables also show ways of increasing system capacity. Table 4‑32 General Capacity Analysis Procedures - Existing Rail Line
Table 4‑33 Capacity Assessment Procedure of Proposed Rail Line
Directory: curated curated -> Concept stage curated -> Concept stage curated -> Republic of Côte d'Ivoire Urbanization Review curated -> Report No: aus11011 Central America curated -> Report No. 94474-pk fiscal Disaster Risk Assessment Options for Consideration curated -> Environmental and Social Management Framework for the Costa Rica Telecommunications Sector Modernization Project curated -> Environment Impact Assessment For Jiangxi Shangrao Sanqingshan Airport Beijing Guohuantiandi Environmental Technology Development Center. Ltd. Oct. 2012 Content curated -> Growth through Innovation An Industrial Strategy for Shanghai By Shahid Yusuf Kaoru Nabeshima April 22nd, 2009 curated -> Report No: 70178. People's Republic of China Download 2.52 Mb. Share with your friends:
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||