48,187 research outputs found

    Urban Rapid Transit Network Capacity Expansion

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    This paper examines a multi-period capacity expansion problem for rapid transit network design. The capacity expansion is realized through the location of train alignments and stations in an urban traffic context by selecting the time periods. The model maximizes the public transportation demand using a limited budget and designing lines for each period. The location problem incorporates the user decisions about mode and route. The network capacity expansion is a long-term planning problem because the network is built over several periods, in which the data (demand, resource price, etc.) are changing like the real problem changes. This complex problem cannot be solved by branch and bound, and for this reason, a heuristic approach has been defined in order to solve it. Both methods have been experimented in test networks

    Mass transit options

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    Choices on public transit options are choices about a city's future. Will there be congestion? Will there be high levels of air and noise pollution? Will transport be affordable? Will services be available to all? The type of public transit system will have a big impact on the answers to these questions. This module aims to provide policy-makers in developing cities - and those advising them - with guidance on choosing appropriate Mass Rapid Transit (MRT) systems. The module begins by briefly describing some basic concepts and defining features of MRT in developing cities. Current applications of each of the main MRT options are then described, focusing on applications in developing cities. Since Metros and Light Rail Transit are still relatively uncommon in low income developing cities, most of this discussion focuses on the recent development of Bus Rapid Transit systems throughout the world

    Public Transport Options for East Asian Mega-cities

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    This paper provides insights of the current state of public transport in East Asian Mega-cities, their characteristics that make them different with other public transport systems in other parts of the world. A combination of high percentage of public transport use, existence of para-transit, poor service quality to respond with high level of motorizations are some of the features of urban public transport in East Asian developing cities. Data from Tokyo, Shanghai, Seoul, Taipei, Ho Chi Minh City, Manila, Jakarta, and Bangkok are analyzed to develop a thorough understanding on the specific features of public transport in the East Asian Mega-cities. Several reform policies and strategies are proposed, including promoting public transport technology to shift the competition from costs to quality, fare integration, suitable financing options, and an appropriate implementation timing, as well as developing a public transport hierarchy to suit the increasing demand for urban mobility

    A Worldwide State-of-the-Art Analysis for Bus Rapid Transit: Looking for the Success Formula

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    This paper’s intended contribution, in terms of providing an additional angle in the existing Bus Rapid Transit (BRT) state-of-the-art knowledge spectrum, is a dual one. On the one hand, it provides a detailed description of the mode, re-defining BRT as an overall concept by identifying, discussing, and categorizing in a systematic way its strengths and its weaknesses in comparison with rail-based solutions and conventional bus services. On the other hand, it presents in detail a number of selected scheme-oriented applications from around the world, looking into some of the basic ingredients behind BRT’s success (or failure) stories. This is a scientific effort that could inform the reader about the current status of BRT internationally and about the challenges and opportunities that exist when trying to materialize BRT’s potential as an effective urban passenger solution that could challenge the merits of more conventional mass-transit options

    Road Expansion and Urban Highways: Consequences Outweigh Benefits in Kathmandu

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    Rapid urbanization has transformed Kathmandu Valley, Nepal, one of the fastest growing metropolitan regions in South Asia. This urbanization, in turn, is leading to considerable social, economic, and environmental stress. The region has seen unplanned growth despite continued planning exercises. In 2011, in response to the rapid urbanization then Prime Minster Baburam Bhattarai initiated road expansion throughout the city to reduce traffic congestion. By mid 2015, it was clear that the road expansion induced greater demand leading to further traffic congestion rather than alleviating the problem. Today, non-motorized (pedestrians and bicycle) road users are more unsafe on the roads than ever before, and the plight of public transport users has remained the same. Traffic congestion has become a more serious problem. Air pollution associated with road construction and an increasing number of vehicles has turned the Kathmandu Valley into a dust bowl with potential for serious human health consequences. Along with road expansion, the government’s inability to regulate land use has contributed to Kathmandu’s current urban sprawl. Road expansion done without proper planning has threatened traditional settlements, many with heritage sites, and led to loss of public spaces and temple courtyards to make space for increasing demand for parking. Another major landscape change has been the building of concrete embankments and exclusive motor roads along the river corridors. The road expansion campaign is still ongoing and is a top priority of the government’s efforts to reduce congestion and improve urban transportation. It is high time the government of Nepal rethinks its vehicle-centric urban transport policy and adopts policy where mobility of people is prioritized. Urban transport planning should work to build a more equitable and inclusive city while addressing accessibility, safety, and environmental health risks of its growing urban population. Today, non-motorized users (pedestrians and bicycle users) are unsafe on the roads than ever before, and the plight of public transport users has remained the same. Road expansion has led to destruction of traditional settlements many with heritage sites and loss of public spaces and temple courtyards to make space for increasing parking demand. Another major landscape change has been the building of concrete embankments and exclusive motor roads along the river corridors. Air pollution associated with road construction and increasing number of vehicles has turned the valley into a dust bowl with potential for serious human health consequences. Along with the road expansion, the government’s inability to regulate proper landuse has contributed to Kathmandu’s current urban sprawl. The road expansion drive is still ongoing and is still the priority for government’s urban transportation initiatives within the Valley. It is high time the government of Nepal rethinks its vehicle-centric urban transport policy and adopts policy where mobility of people is prioritized. Urban transport planning should work on building more equitable and inclusive city while addressing accessibility, safety, and environmental health risk associated for its growing urban population

    Automated Transit Networks (ATN): A Review of the State of the Industry and Prospects for the Future, MTI Report 12-31

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    The concept of Automated Transit Networks (ATN) - in which fully automated vehicles on exclusive, grade-separated guideways provide on-demand, primarily non-stop, origin-to-destination service over an area network – has been around since the 1950s. However, only a few systems are in current operation around the world. ATN does not appear “on the radar” of urban planners, transit professionals, or policy makers when it comes to designing solutions for current transit problems in urban areas. This study explains ATN technology, setting it in the larger context of Automated Guideway Transit (AGT); looks at the current status of ATN suppliers, the status of the ATN industry, and the prospects of a U.S.-based ATN industry; summarizes and organizes proceedings from the seven Podcar City conferences that have been held since 2006; documents the U.S./Sweden Memorandum of Understanding on Sustainable Transport; discusses how ATN could expand the coverage of existing transit systems; explains the opportunities and challenges in planning and funding ATN systems and approaches for procuring ATN systems; and concludes with a summary of the existing challenges and opportunities for ATN technology. The study is intended to be an informative tool for planners, urban designers, and those involved in public policy, especially for urban transit, to provide a reference for history and background on ATN, and to use for policy development and research

    Paradoxes of Traffic Flow and Economics of Congestion Pricing

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    This paper utilizes a unique county-level dataset to examine technical efficiency and technology gap in China’s agriculture. We classify the counties into four regions with distinctive levels of economic development, and hence production technologies. A meta-frontier analysis is applied to the counties. We find that although the eastern counties have the highest efficiency scores with respect to the regional frontier but the northeastern region leads in terms of agricultural production technology nationwide. Meanwhile, the mean efficiency of the northeastern counties is particularly low, suggesting technology and knowledge diffusion within region might help to improve production efficiency and thus output.China’s grain production; County-level; Metafrontier; Stochastic production frontier; Technical efficiency

    Climate Action In Megacities 3.0

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    "Climate Action in Megacities 3.0" (CAM 3.0) presents major new insights into the current status, latest trends and future potential for climate action at the city level. Documenting the volume of action being taken by cities, CAM 3.0 marks a new chapter in the C40-Arup research partnership, supported by the City Leadership Initiative at University College London. It provides compelling evidence about cities' commitment to tackling climate change and their critical role in the fight to achieve global emissions reductions

    Keys to effective transit strategies for commuting

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    Commuting poses relevant challenges to cities\u2019 transport systems. Various studies have identified transit as a tool to enhance sustainability, efficiency and quality of the commute. The scope of this paper is to present strategies that increase public transport attractiveness and positively impact its modal share, looking at some case studies and underlining key success factors and possible elements of replica to be ultimately planned in some of the contexts of the Interreg project SMART-COMMUTING. The strategies analyzed in this paper concern prices and fares, service expansion, service improvements, usage of vehicle locators and other technology, changes to the built environment. Relevant gains in transit modal share are more easily achievable when considering integrations between various strategies, thus adapting and tailoring the planning process to the specific context

    Bus Rapid Transit: A Handbook for Partners, MTI Report 06-02

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    In April 2005, the Caltrans Division of Research and Innovation (DRI) asked MTI to assist with the research for and publication of a guidebook for use by Caltrans employees who work with local transit agencies and jurisdictions in planning, designing, and operating Bus Rapid Transit (BRT) systems that involve state facilities. The guidebook was also to assist to transit operators, local governments, community residents, and other stakeholders dealing with the development of BRT systems. Several areas in the state have experienced such projects ( San Diego , Los Angeles , San Francisco , and Alameda County ) and DRI wished to use that experience to guide future efforts and identify needed changes in statutes, policies, and other state concerns. Caltrans convened a Task Team from the Divisions of Research and Innovation, Mass Transportation, and Operations, together with stakeholders representing many of those involved with the BRT activities around the state. Prior to MTI’s involvement, this group produced a white paper on the topic, a series of questions, and an outline of the guidebook that MTI was to write. The MTI team conducted case studies of the major efforts in California, along with less developed studies of some of the other BRT programs under development or in early implementation phases around the state. The purpose was to clarify those issues that need to be addressed in the guidebook, as well as to compile information that would identify items needing legislative or regulatory action and items that Caltrans will need to address through district directives or other internal measures. A literature scan was used to develop a bibliography for future reference. The MTI team also developed a draft Caltrans director’s policy document, which provides the basis for Caltrans’ actions. This ultimately developed to be a project within a project. MTI submitted a draft document to Caltrans as a final product from the Institute. Task team members and Caltrans staff and leadership provided extensive review of the draft Bus Rapid Transit: A Handbook for Partners. Caltrans adopted a new Director’s Policy and published the document, BRT Caltrans. The MTI “wraparound” report presented below discusses in more detail the process that was followed to produce the draft report. The process was in many ways as much a project as the report itself
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