Smart and sustainable public transport systems through improving level and quality of service

Buses are considered a slow, low comfort and low reliability transport system, thus its negative and por image. In the framework of the 3iBS project (2012), several examples of innovative and/or effective solutions regarding the Level of Service (LoS) were analysed aiming to provide operators, practitioners and policy makers with a set of Good Practice Guidelines to strengthen the competitiveness of the bus in the urban environment. The identification of the key indicators regarding vehicles, infrastructure and operation was possible through the analysis of a set of case studies -among which Barcelona (Spain), Cagliari (Italy), London (United Kingdom), Paris and Nantes (France). A cross comparison between the case studies was carried out for contrasting the level of achievement of the different criteria considered. The information provided on Regulatory, Financial and Technical issues allows the identification of a number of specific factors influencing the implementation of a high quality transport scheme, and set the basis for the elaboration of a set of Guidelines for the implementation of an intelligent, innovative and integrated bus system, including the main barriers to be tackled.

Análise de eficiência energética de transportes rodoviários

Projecto para obtenção do grau de Mestre em Engenharia Informática e de computadores

Decomposition Methods and Network Design Problems

Decomposition based approaches are recalled from primal and dual point of view. The possibility of building partially disaggregated reduced master problems is investigated. This extends the idea of aggregated-versus-disaggregated formulation to a gradual choice of alternative level of aggregation. Partial aggregation is applied to the linear multicommodity minimum cost flow problem. The possibility of having only partially aggregated bundles opens a wide range of alternatives with different trade-offs between the number of iterations and the required computation for solving it. This trade-off is explored for several sets of instances and the results are compared with the ones obtained by directly solving the natural node-arc formulation. An iterative solution process to the route assignment problem is proposed, based on the well-known Frank Wolfe algorithm. In order to provide a first feasible solution to the Frank Wolfe algorithm, a linear multicommodity min-cost flow problem is solved to optimality by using the decomposition techniques mentioned above. Solutions of this problem are useful for network orientation and design, especially in relation with public transportation systems as the Personal Rapid Transit. A single-commodity robust network design problem is addressed. In this, an undirected graph with edge costs is given together with a discrete set of balance matrices, representing different supply/demand scenarios. The goal is to determine the minimum cost installation of capacities on the edges such that the flow exchange is feasible for every scenario. A set of new instances that are computationally hard for the natural flow formulation are solved by means of a new heuristic algorithm. Finally, an efficient decomposition-based heuristic approach for a large scale stochastic unit commitment problem is presented. The addressed real-world stochastic problem employs at its core a deterministic unit commitment planning model developed by the California Independent System Operator (ISO).

Operational assessment of Paralympics transit system: low-floor buses, lift-equipped buses, and signage.

Federal Transit Administration, Washington, D.C.

Joint development - a handbook for local government officials.

Urban Mass Transportation Administration, Washington, D.C.

Financial management for transit: a handbook. Final report.

Mode of access: Internet.

ITS Institutional and Legal Issues Program. Review of the SaFIRES operational test. Final report.

Transportation Department, Joint Program Office for Intelligent Transportation Systems, Washington, D.C.

Cost estimates for selected California smart traveler operational tests. Volume 2: appendices.

Federal Transit Administration, Washington, D.C.

Transit security procedures guide. Final report.

Federal Transit Administration, Washington, D.C.

Direction of DOT fire research - 1979 edition. Final report.

Transportation Department, Office of Environment and Safety, Washington, D.C.

Cost estimates for selected California smart traveler operational tests. Volume 1: technical report.

Federal Transit Administration, Washington, D.C.

Increasing commuting by transit and ridesharing: many factors should be considered. Comptroller General's report to the Congress.

Mode of access: Internet.

Transit fare prepayment. Final report.

Urban Mass Transportation Administration, Washington, D.C.

Transit System Security Program planning guide. Final report.

Federal Transit Administration, Washington, D.C.

Bellevue smart traveler and cellular telecommunications. Final report.

Federal Transit Administration, Washington, D.C.