Estimating the bus user time benefits of implementing a median busway: Methodology and case study |
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Institution: | 1. Transport Studies Group, School of Civil and Building Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom;2. Center for Sustainable Urban Development (CEDEUS) and Center for BRT Excellence, Pontificia Universidad Catolica de Chile, Casilla 306, Cod. 105, Santiago 22, Chile;1. School of Rural and Surveying Engineering, National Technical University of Athens, 5, Iroon Polytechneiou, 15773, Zografou Campus, Athens, Greece;2. School of Civil Engineering, National Technical University of Athens 9, Iroon Polytechniou str., 15770, Zografou Campus, Greece;3. School of Rural and Surveying Engineering, National Technical University of Athens, 9, Iroon Polytechneiou, 15770, Zografou Campus, Athens, Greece;4. Department of Civil Engineering, University of West Attica, Campus 1, Ag. Spyridonos Str.12210 Egaleo-Athens, Greece;1. Departamento de Ingeniería Civil, Universidad de Chile, Chile;2. Instituto Sistemas Complejos de Ingeniería (ISCI), Chile;3. Directorio de Transporte Público Metropolitano DTPM, Chile |
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Abstract: | This paper presents a general framework to estimate the bus user time benefits of a median busway including the effects on travel time and access time. Unlike previous models, we take into account the effects of geometry and the interaction with the demand structure. Models for predicting the bus in-vehicle time benefits of a median dual carriageway busway against mixed traffic condition on 2 and 3 lanes roads are estimated using data from a case study in Santiago (Chile), using a bus travel time model empirically estimated and considering different base case situations, including mixed traffic operations and bus lanes. Results of the application show that the expected in-vehicle time savings of a median busway might be reduced by access time losses due to increased walking distances and road crossing delays. Also, that net time benefits can vary significantly according to the base situation and the structure of demand considered. These findings point out to the need of including a wider set of impacts when studying the benefits of median busways, beyond in-vehicle time savings only. The empirical work presented here is completely based on passive data coming from GPS and smartcards, what makes easier and cheaper to conduct this type of analysis as well as to do it with a comprehensive scope at an early stage of the development of a BRT project. This framework can be extended to other types of dedicated bus lanes provided that a corresponding bus travel time savings model is available. |
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Keywords: | Travel time Buses Bus rapid transit Busway time benefits Dedicated bus lanes Access time |
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