932 resultados para Multimodal Transportation
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Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.
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Thesis (Master's)--University of Washington, 2016-06
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Federal transportation legislation in effect since 1991 was examined to determine outcomes in two areas: (1) The effect of organizational and fiscal structures on the implementation of multimodal transportation infrastructure, and (2) The effect of multimodal transportation infrastructure on sustainability. Triangulation of methods was employed through qualitative analysis (including key informant interviews, focus groups and case studies), as well as quantitative analysis (including one-sample t-tests, regression analysis and factor analysis). ^ Four hypotheses were directly tested: (1) Regions with consolidated government structures will build more multimodal transportation miles: The results of the qualitative analysis do not lend support while the results of the quantitative findings support this hypothesis, possibly due to differences in the definitions of agencies/jurisdictions between the two methods. (2) Regions in which more locally dedicated or flexed funding is applied to the transportation system will build a greater number of multimodal transportation miles: Both quantitative and qualitative research clearly support this hypothesis. (3) Cooperation and coordination, or, conversely, competition will determine the number of multimodal transportation miles: Participants tended to agree that cooperation, coordination and leadership are imperative to achieving transportation goals and objectives, including targeted multimodal miles, but also stressed the importance of political and financial elements in determining what ultimately will be funded and implemented. (4) The modal outcomes of transportation systems will affect the overall health of a region in terms of sustainability/quality of life indicators: Both the qualitative and the quantitative analyses provide evidence that they do. ^ This study finds that federal legislation has had an effect on the modal outcomes of transportation infrastructure and that there are links between these modal outcomes and the sustainability of a region. It is recommended that agencies further consider consolidation and strengthen cooperation efforts and that fiscal regulations are modified to reflect the problems cited in qualitative analysis. Limitations of this legislation especially include the inability to measure sustainability; several measures are recommended. ^
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This document describes planned investments in Iowa’s multimodal transportation system including aviation, transit, railroads, trails, and highways. This five-year program documents $3.5 billion of highway and bridge construction projects on the primary road system using federal and state funding. Of that funding, a little over $500 million is available due to the passage of Senate File 257 in February 2015. As required by Senate File 257, this program includes a list of the critical highway and bridge projects funded with the additional revenue. Since last year’s program, a new federal surface transportation authorization bill was passed and signed into law. This authorization bill is titled Fixing America’s Surface Transportation (FAST) Act. The FAST Act, for the first time in many years, provides federal funding certainty over most of the time covered by this Program. In addition, it provided additional federal funding for highway and bridge projects.
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Context Sensitive Solutions (CSS) is an interdisciplinary approach that seeks effective, multimodal transportation solutions by working with stakeholders to develop, build and maintain cost-effective transportation facilities which fit into and reflect the project's surroundings -- it's context.
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Part 18: Optimization in Collaborative Networks
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The Public Participation Plan provides direction for effective participation in the development of the South Carolina Department of Transportation’s (SCDOT) transportation plans and programs. For SCDOT’s stakeholders, the participation plan describes opportunities to participate in identifying the statewide priorities for transportation investments in South Carolina. Two major components of the statewide planning process are the Statewide Multimodal Transportation Plan and the State Transportation Improvement Program (STIP). The Statewide Multimodal Transportation Plan provides long-term guidance for the development of transportation programs and establishes strategies to achieve transportation goals for a 20-year period. The STIP is a short-term program that lists all roads, bridge, and transit projects scheduled for improvement based on available funding over a six-year period.
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The purposes of this report (Phase II of the project) are to specify in mathematical form the individual modules of the conceptual model developed in Phase I, to identify and evaluate sources of data for the model set, and to develop the transport networks necessary to support the models.
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A Multimodal Seaport Container Terminal (MSCT) is a complex system which requires careful planning and control in order to operate efficiently. It consists of a number of subsystems that require optimisation of the operations within them, as well as synchronisation of machines and containers between the various subsystems. Inefficiency in the terminal can delay ships from their scheduled timetables, as well as cause delays in delivering containers to their inland destinations, both of which can be very costly to their operators. The purpose of this PhD thesis is to use Operations Research methodologies to optimise and synchronise these subsystems as an integrated application. An initial model is developed for the overall MSCT; however, due to a large number of assumptions that had to be made, as well as other issues, it is found to be too inaccurate and infeasible for practical use. Instead, a method of developing models for each subsystem is proposed that then be integrated with each other. Mathematical models are developed for the Storage Area System (SAS) and Intra-terminal Transportation System (ITTS). The SAS deals with the movement and assignment of containers to stacks within the storage area, both when they arrive and when they are rehandled to retrieve containers below them. The ITTS deals with scheduling the movement of containers and machines between the storage areas and other sections of the terminal, such as the berth and road/rail terminals. Various constructive heuristics are explored and compared for these models to produce good initial solutions for large-sized problems, which are otherwise impractical to compute by exact methods. These initial solutions are further improved through the use of an innovative hyper-heuristic algorithm that integrates the SAS and ITTS solutions together and optimises them through meta-heuristic techniques. The method by which the two models can interact with each other as an integrated system will be discussed, as well as how this method can be extended to the other subsystems of the MSCT.
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The use of containers have greatly reduced handling operations at ports and at all other transfer points, thus increasing the efficiency and speed of transportation. This was done in an attempt to cut down the cost of maritime transport, mainly by reducing cargo handling and costs, and ships' time in port by speeding up handling operations. This paper discusses the major factors influencing the transfer efficiency of seaport container terminals. A network model is designed to analyse container progress in the system and applied to a seaport container terminal. The model presented here can be seen as a decision support system in the context of investment appraisal of multimodal container terminals. (C) 2000 Elsevier Science Ltd.
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Several anuran species use multimodal signals to communicate in diverse social contexts. Our study describes acoustic and visual behaviours of the Small Torrent Frog (Micrixalus aff. saxicola), a diurnal frog endemic to the Western Ghats of India. During agonistic interactions males display advertisement calls, foot-flagging and tapping (foot lifting) behaviours to signal the readiness to defend perching sites in perennial streams. Results from a quantitative video analysis of male-male interactions indicate that foot-flagging displays were used as directional signals toward the opponent male, but were less abundant than calls. The acoustic and visual signals were not functionally linked. The call of Micrixalus aff. saxicola thereby did not act as an alert signal. Analysis of behavioural transitions revealed that kicking behaviours (physical attacks) significantly elicited kicks from interacting males. We suggest that foot-flagging displays ritualized from this frequently observed fighting technique to reduce physical attacks.
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"Mémoire présenté à la Faculté des études supérieures en vue de l'obtention du grade de L.L.M. en droit des affaires"
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Durante este trabajo se analizarán los impactos económicos, sociales y ambientales que generaría el desarrollo de una Plataforma Logística Multimodal en Puerto Asís, Putumayo, en la región amazónica comprendida por Colombia, Brasil y Ecuador, como opción de salida y entrada de mercancías. Esto con el fin de establecer cuál es la ruta más óptima para el transporte de mercancías hacia el continente asiático. Este proyecto surge como una iniciativa en la constitución de un eje de transporte para la interconexión de los puertos de la región amazónica. Consiste en el establecimiento de infraestructura para vías terrestres y marítimas que agilicen el transporte y reduzcan los altos costos a los que se enfrentan el comercio de la región. Para justificar la viabilidad de la realización este proyecto, es necesario evaluar diferentes impactos que producirían en diferentes ámbitos como los económicos, ambientales y sociales. Para la búsqueda de los impactos se establecen los perfiles actuales de los países vinculados al proyecto de la Plataforma Logística Multimodal en Puerto Asís, Putumayo. Esto con el fin de conocer sus respectivas condiciones actuales y hallar en qué medida se verán alteradas. Posteriormente, se expondrá las circunstancias de infraestructura de esta zona, demostrando los desafíos que exige el desarrollo de este tipo de proyectos en la región amazónica con la intención final de mejorar la infraestructura no solo de este sector sino del país, volviéndolo más competitivo a nivel global. Finalmente se evaluaran los efectos que la construcción de la plataforma generaría justificando su desarrollo.
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Extrae del informe de consultor "An agenda for transport planning in the Caribbean" las sugerencias para el futuro programa de trabajo en relacion a las areas de actividad, modalidades para la implementacion del programa, aspectos financieros, y creacion de una Unidad de Investigacion de Transporte Multimodal.