4,646 research outputs found

    Corporate strategies, freight transport and regional development

    Get PDF
    Corporate strategies and decisions concerning location, such as outsourcing of individual production processes, have an impact on the volume of freight traffic. Due to concentration of core competences, new logistics trends, growing importance of services and liberalization of markets, corporate strategies undergo rapid changes. Their spatial impact is of interest, especially when taking into account that new corporate behaviour can increase as well as reduce freight traffic. The overall impact of these changes are very unclear and little empirical evidence is available besides various insights from networks in the automotive sector. For example reducing the level of in-house production may multiply the number of suppliers. They in turn deliver the required parts more frequently but in smaller batches thus increasing the volume of freight transportation. On the other hand the manifest trend towards the concentration and bundling of single suppliers in the form of component or systems suppliers tends to reduce freight traffic for production inputs. The paper examines two key aspects. First it sheds light on the interrelationships of structural changes of the economy, in particular of corporate behaviour (e.g. outsourcing, just-in-time production, telecommunications) and the volume of freight traffic. Second we will try to answer the following question: in what types of companies does the division of labour along the chain of value added lead to increased freight traffic and where can freight traffic be reduced by means of telematics. The paper draws from an empirical study of a region in Central Switzerland. Recommendations for public as well as private actors will deal with potentials to reduce freight traffic through cooperative efforts.

    An intercompany dispatch support system for intermodal transport chains

    Get PDF
    A critical problem in an intermodal transport chain is the direct meet at the transhipment nodes. This requires information technology and modern communication facilities as well as much closer collaboration between all the concerned transport operators in the chain. The TELETRUCK system - currently under development at the German Research Center for Artificial Intelligence (Deutsches Forschungszentrum für Künstliche Intelligenz DFKI GmbH) - is a dispatch support system that tackles those problems. Intercompany planning, scheduling, and monitoring of intermodal transport chains will be supported by our system. It aims at providing smooth access to railway time tables and rail-based transport services and - much more important - at allowing for the planning of both, exclusively road-based and combined journeys and showing their cost-effectiveness, where- and whenever possible. We will describe our approach - based on intelligent agent technology - both the current state of implementation and our goal of the very next future

    Internal report cluster 1: Urban freight innovations and solutions for sustainable deliveries (1/4)

    Get PDF
    Technical report about sustainable urban freight solutions, part 1 of

    Investigation of mobility supports for smart-securedseamless (SSS) public transportation in Kuala- Lumpur based on TV white space

    Get PDF
    The future smart public transport infrastructure is emerging as a complex web, where fine-grained monitoring of all transportation systems via wireless communication will be made possible. Inadvertently, resulting in Smart-Secured-Seamless (SSS) public transportation network infrastructure. Kuala-Lumpur (KL), the capital city of Malaysia is endowed with a network of well-developed and articulated public transportation system. However, there is no hotspot while in or around the KL public transport hubs to facilitate Smart-Secured-Seamless connectivity either for the management or for the commuters. Leading to relying on commercial Internet providers for internet access. In order to solve this problem, we are proposing using Television White Space (TVWS) technology to provide connectivity to all bus/train public transport hubs in Kuala-Lumpur and environs. Based on our framework, we draw conclusion regarding the feasibility and commercial importance of SSS public transport framework, and identify some of the remaining technical challenges. We presented simulation based on Clarke-Gans channel model to study Doppler shift effects. Results, indicate that there is no remarkable performance difference between 802.22 TVWS wireless standard and 802.16e WiMAX, which is the closest wireless standard to 802.22. Hence, offering TVWS as the preferred and alternative wireless standard for intelligent transport system in Malaysia. View les

    Computational Challenges in Cooperative Intelligent Urban Transport

    Get PDF
    This report documents the talks and group work of Dagstuhl Seminar 16091 “Computational Challenges in Cooperative Intelligent Urban Transport”. This interdisciplinary seminar brought researchers together from many fields including computer science, transportation, operations research, mathematics, machine learning and artificial intelligence. The seminar included two formats of talks: several minute research statements and longer overview talks. The talks given are documented here with abstracts. Furthermore, this seminar consisted of significant amounts of group work that is also documented with short abstracts detailing group discussions and planned outcomes

    Shared-Use Bus Priority Lanes On City Streets: Case Studies in Design and Management, MTI Report 11-10

    Get PDF
    This report examines the policies and strategies governing the design and, especially, operations of bus lanes in major congested urban centers. It focuses on bus lanes that operate in mixed traffic conditions; the study does not examine practices concerning bus priority lanes on urban highways or freeways. Four key questions addressed in the paper are: How do the many public agencies within any city region that share authority over different aspects of the bus lanes coordinate their work in designing, operating, and enforcing the lanes? What is the physical design of the lanes? What is the scope of the priority use granted to buses? When is bus priority in effect, and what other users may share the lanes during these times? How are the lanes enforced? To answer these questions, the study developed detailed cases on the bus lane development and management strategies in seven cities that currently have shared-use bus priority lanes: Los Angeles, London, New York City, Paris, San Francisco, Seoul, and Sydney. Through the case studies, the paper examines the range of practices in use, thus providing planners and decision makers with an awareness of the wide variety of design and operational options available to them. In addition, the report highlights innovative practices that contribute to bus lanes’ success, where the research findings make this possible, such as mechanisms for integrating or jointly managing bus lane planning and operations across agencies

    Distributed, decentralised and compensational mechanisms for platoon formation

    Get PDF
    Verkehrsprobleme nehmen mit der weltweiten Urbanisierung und der Zunahme der Anzahl der Fahrzeuge pro Kopf zu. Platoons, eine Formation von eng hintereinander fahrenden Fahrzeugen, stellen sich als mögliche Lösung dar, da bestehende Forschungen darauf hinweisen, dass sie zu einer besseren Straßenauslastung beitragen, den Kraftstoffverbrauch und die Emissionen reduzieren und Engpässe schneller entlasten können. Rund um das Thema Platooning gibt es viele Aspekte zu erforschen: Sicherheit, Stabilität, Kommunikation, Steuerung und Betrieb, die allesamt notwendig sind, um den Einsatz von Platooning im Alltagsverkehr näher zu bringen. Während in allen genannten Bereichen bereits umfangreiche Forschungen durchgeführt wurden, gibt es bisher nur wenige Arbeiten, die sich mit der logischen Gruppierung von Fahrzeugen in Platoons beschäftigen. Daher befasst sich diese Arbeit mit dem noch wenig erforschten Problem der Platoonbildung, wobei sich die vorhandenen Beispiele mit auf Autobahnen fahrenden Lastkraftwagen beschäftigen. Diese Fälle befinden sich auf der strategischen und taktischen Ebene der Planung, da sie von einem großen Zeithorizont profitieren und die Gruppierung entsprechend optimiert werden kann. Die hier vorgestellten Ansätze befinden sich hingegen auf der operativen Ebene, indem Fahrzeuge aufgrund der verteilten und dezentralen Natur dieser Ansätze spontan und organisch gruppiert und gesteuert werden. Dadurch entstehen sogenannte opportunistische Platoons, die aufgrund ihrer Flexibilität eine vielversprechende Voraussetzung für alle Netzwerkarte bieten könnten. Insofern werden in dieser Arbeit zwei neuartige Algorithmen zur Bildung von Platoons vorgestellt: ein verteilter Ansatz, der von klassischen Routing-Problemen abgeleitet wurde, und ein ergänzender dezentraler kompensatorischer Ansatz. Letzteres nutzt automatisierte Verhandlungen, um es den Fahrzeugen zu erleichtern, sich auf der Basis eines monetären Austausches in einem Platoon zu organisieren. In Anbetracht der Tatsache, dass alle Verkehrsteilnehmer über eine Reihe von Präferenzen, Einschränkungen und Zielen verfügen, muss das vorgeschlagene System sicherstellen, dass jede angebotene Lösung für die einzelnen Fahrzeuge akzeptabel und vorteilhaft ist und den möglichen Aufwand, die Kosten und die Opfer überwiegt. Dies wird erreicht, indem den Platooning-Fahrzeugen eine Form von Anreiz geboten wird, im Sinne von entweder Kostensenkung oder Ampelpriorisierung. Um die vorgeschlagenen Algorithmen zu testen, wurde eine Verkehrssimulation unter Verwendung realer Netzwerke mit realistischer Verkehrsnachfrage entwickelt. Die Verkehrsteilnehmer wurden in Agenten umgewandelt und mit der notwendigen Funktionalität ausgestattet, um Platoons zu bilden und innerhalb dieser zu operieren. Die Anwendbarkeit und Eignung beider Ansätze wurde zusammen mit verschiedenen anderen Aspekten untersucht, die den Betrieb von Platoons betreffen, wie Größe, Verkehrszustand, Netzwerkpositionierung und Anreizmethoden. Die Ergebnisse zeigen, dass die vorgeschlagenen Mechanismen die Bildung von spontanen Platoons ermöglichen. Darüber hinaus profitierten die teilnehmenden Fahrzeuge mit dem auf verteilter Optimierung basierenden Ansatz und unter Verwendung kostensenkender Anreize unabhängig von der Platoon-Größe, dem Verkehrszustand und der Positionierung, mit Nutzenverbesserungen von 20% bis über 50% im Vergleich zur untersuchten Baseline. Bei zeitbasierten Anreizen waren die Ergebnisse uneinheitlich, wobei sich der Nutzen einiger Fahrzeuge verbesserte, bei einigen keine Veränderung eintrat und bei anderen eine Verschlechterung zu verzeichnen war. Daher wird die Verwendung solcher Anreize aufgrund ihrer mangelnden Pareto-Effizienz nicht empfohlen. Der kompensatorische und vollständig dezentralisierte Ansatz weißt einige Vorteile auf, aber die daraus resultierende Verbesserung war insgesamt vernachlässigbar. Die vorgestellten Mechanismen stellen einen neuartigen Ansatz zur Bildung von Platoons dar und geben einen aussagekräftigen Einblick in die Mechanik und Anwendbarkeit von Platoons. Dies schafft die Voraussetzungen für zukünftige Erweiterungen in der Planung, Konzeption und Implementierung effektiverer Infrastrukturen und Verkehrssysteme.Traffic problems have been on the rise corresponding with the increase in worldwide urbanisation and the number of vehicles per capita. Platoons, which are a formation of vehicles travelling close together, present themselves as a possible solution, as existing research indicates that they can contribute to better road usage, reduce fuel consumption and emissions and decongest bottlenecks faster. There are many aspects to be explored pertaining to the topic of platooning: safety, stability, communication, controllers and operations, all of which are necessary to bring platoons closer to use in everyday traffic. While extensive research has already made substantial strides in all the aforementioned fields, there is so far little work on the logical grouping of vehicles in platoons. Therefore, this work addresses the platoon formation problem, which has not been heavily researched, with existing examples being focused on large, freight vehicles travelling on highways. These cases find themselves on the strategic and tactical level of planning since they benefit from a large time horizon and the grouping can be optimised accordingly. The approaches presented here, however, are on the operational level, grouping and routing vehicles spontaneously and organically thanks to their distributed and decentralised nature. This creates so-called opportunistic platoons which could provide a promising premise for all networks given their flexibility. To this extent, this thesis presents two novel platoon forming algorithms: a distributed approach derived from classical routing problems, and a supplementary decentralised compensational approach. The latter uses automated negotiation to facilitate vehicles organising themselves in a platoon based on monetary exchanges. Considering that all traffic participants have a set of preferences, limitations and goals, the proposed system must ensure that any solution provided is acceptable and beneficial for the individual vehicles, outweighing any potential effort, cost and sacrifices. This is achieved by offering platooning vehicles some form of incentivisation, either cost reductions or traffic light prioritisation. To test the proposed algorithms, a traffic simulation was developed using real networks with realistic traffic demand. The traffic participants were transformed into agents and given the necessary functionality to build platoons and operate within them. The applicability and suitability of both approaches were investigated along with several other aspects pertaining to platoon operations such as size, traffic state, network positioning and incentivisation methods. The results indicate that the mechanisms proposed allow for spontaneous platoons to be created. Moreover, with the distributed optimisation-based approach and using cost-reducing incentives, participating vehicles benefited regardless of the platoon size, traffic state and positioning, with utility improvements ranging from 20% to over 50% compared to the studied baseline. For time-based incentives the results were mixed, with the utility of some vehicles improving, some seeing no change and for others, deteriorating. Therefore, the usage of such incentives would not be recommended due to their lack of Pareto-efficiency. The compensational and completely decentralised approach shows some benefits, but the resulting improvement was overall negligible. The presented mechanisms are a novel approach to platoon formation and provide meaningful insight into the mechanics and applicability of platoons. This sets the stage for future expansions into planning, designing and implementing more effective infrastructures and traffic systems

    The economy of the Beijing Olympic Games : An analysis of first impacts and prospects

    Get PDF
    This paper was presented at the International Sport Business Symposium, held by the Capital University of Economics and Business in Beijing, in 2008. The speakers, Ferran Brunet, as a professor at the Autonomous University of Barcelona and Zuo Xinwen, as a member of Beijing Development and Reform Commission, both set out to analyze changes in the economic and social development of the city which were undertaken with the aim to celebrate the 2008 Olympic Games. They discuss aspects as a transformation in the mode of economic growth, resources of the Organizing Committee, investments related to the Games, transport and communications, industries, the balance of urban and rural development, urban construction and management service and operations into a well-off society.Texto presentado en el Simposio Internacional 'Sport Business', celebrado por la Universidad de Economía y Empresa de la Capital de Pequín, en 2008. Los ponentes, Ferran Brunet, como profesor de la Universidad Autónoma de Barcelona y Zuo Xinwen, miembro de la Comisión del Desarrollo y Reforma de Pequín, se proponen analizar los cambios producidos en el desarrollo económico y social de la ciudad con motivo de la celebración de los Juegos Olímpicos del 2008. Entre otros aspectos tratan la transformación en el modo de crecimiento económico, los recursos del Comité Organizador, las inversiones relacionadas con los Juegos, el transporte y las comunicaciones, las industrias, el equilibrio del desarrollo urbano y rural, la construcción urbana y la gestión y las acciones hacia una sociedad acomodada.Text presentat al Simposi Internacional 'Sport Business', celebrat per la Universitat d'Economia i Empresa de la Capital de Pequín, el 2008. Els ponents, en Ferran Brunet, com a professor de la Universitat Autònoma de Barcelona i Zuo Xinwen, membre de la Comissió del Desenvolupament i Reforma de Pequín, es proposen analitzar els canvis produïts en el desenvolupament econòmic i social de la ciutat amb motiu de la celebració dels Jocs Olímpics del 2008. Entre altres aspectes tracten la transformació en el mode de creixement econòmic, els recursos del Comitè Organitzador, les inversions relacionades amb els Jocs, el transport i les comunicacions, les indústries, l'equilibri del desenvolupament urbà i rural, la construcció urbana i la gestió i les accions cap a una societat benestant
    corecore