100 research outputs found
Predicting the effects of logistics innovations on freight systems: Directions for research
Logistics processes underlying freight transport are changing rapidly, driven by progress in information technology and an unparalleled growth of consumer involvement in supply chains. This development is also driving change in freight transport flows, by all modes of transport. We argue that an understanding of logistics innovations is a prerequisite for effective explorations of future freight flows and design of transport policies. Our main objective is to review these innovations and derive needs for research into freight modelling. We focus on 3 basic dimensions of model improvement: the structural elements of the system that are modelled, the functional relations between these elements, and the dynamic properties of models.Transport and PlanningTransport and Logistic
The Influence of Logistics Decisions on Transport Decarbonization: Lessons from Local to Global Scale
One of the proposed approaches to decarbonize freight transport systems is to internalize the environmental costs of transport, by means of carbon emission-based taxes. The expected impact is a reduction of transport demand and an increased use of environmentally friendly transport technologies. The magnitude of the impact will depend on the levels of taxation, the activities to which they apply and the degrees of freedom allowed to companies to react to the taxes. In this chapter we explore the impact mechanisms of carbon taxes by investigating the reorganization responses of freight decision-makers. We do this through a series of empirical cases of recent modelling studies at city, corridor, country, continent and global level. The city case involves an application of an agent-based model to evaluate a carbon credit point system for city logistics. The corridor case involves carbon pricing of container transport in the hinterland of the port of Rotterdam over a multimodal network. The country and continental cases describe the effects of network-wide truck charging, with a focus on mode choice, vehicle type and routing. The global case concerns a full economic impact analysis of internalization of external costs of supply chains, also looking at the effect of changes in sourcing decisions of companies. We draw lessons concerning the impacts of logistics decisions on the impact of policies and identify needs for further research. Common findings relevant for climate change policy include the following: (1) prices needed to achieve a significant impact are a multiple of current market prices, (2) logistics decisions may act as buffer for the propagation of taxes towards consumers and, as a result, (3) the ultimate price impacts for consumers could remain small. In order to be able to predict impacts of climate policies, there is a need to continue research on the way companies take logistics decisions. This includes decisions in specific areas or logistics, but also on decision processes, to better understand the dynamics of impact pathways.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Transport and PlanningTransport and Logistic
Data collection on Shipper's Preferences Using Simulation Games: A Synchromodality Case Study
The development of new more efficient freight transportation services requires in depth understanding of the engaged stakeholders behavior. Simulation Games (SG) have been used to study decisions and raise awareness over complex transport problems. This paper investigates the possibility of applying a simulation game as an innovative data collection tool for choices related to freight transport. Games sessions were organised with Dutch logistics managers and data on their choices for synchromodal services were collected. Model results revealed reliability, costs and reduced work load as key factors making shippers to opt for more synchromodal services. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Transport and PlanningTransport and Logistic
Modelling logistics for freight transport policy analysis
EditorialGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Transport and PlanningTransport and Logistic
Sustainable freight transport
Transport and PlanningTransport and Logistic
Supply chain elements in freight transport modelling
Editorial: This editorial introduces the papers of a special issue of the journal on freight transport modelling. Together, 9 papers present recent advances in 3 key areas of descriptive and predictive freight modelling: activity chaining, joint modelling of choices and segmentation of users. Next to a methodological contribution in one of these 3 areas, several papers also present empirical findings that are of broader relevance for different choice problems, industries and countries.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Transport and PlanningTransport and Logistic
Appraisal of freight projects and policies
Freight transport systems are facing ever-growing demand and increasingly stringent requirements. Governments are pressured to develop new policies and fund new projects that drive forward the freight transport systems. We provide an overview of typical evaluation approaches used for freight transport policies and projects, from the public policy perspective. We make a simple introduction to the freight transport system, including the most representative agents and components. We introduce a basic framework, briefly reviewing some key literature on the topic and describe the salient features of the state of freight transport appraisal practice today. We also introduce the main freight transport modeling approaches that support project appraisal. We distinguish three types of freight projects according to their geographical scope—global, national and local level—as the appraisal techniques differ. Cost-Benefit Analysis is the prevalent technique in global level projects and very common in national level projects. Multicriteria Analysis type approaches dominate at the local level. Finally, we identify research challenges related to appraisal of freight transport projects and policies.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Transport and PlanningTransport and Logistic
An empirical agent-based simulation system for urban goods transport (MASS-GT)
Urban planners face a few challenges in making urban freight transport more sustainable: reduce urban congestion, provide reliable deliverywindows, decrease logistic costs, reduce emissions, improve safety. New data may provide a key in tackling these issues. This paper presentsan agent-based urban freight modeling framework: MASS-GT. Objective of the project is to develop a comprehensive simulation frameworkthat describes logistic decision making in the context of urban transport planning. Empirical basis is provided by a large dataset with observedfreight transport data for The Netherlands. Part of the data has been collected using an automated procedure to report complete freight trippatterns from the transport management system. This provides more dense and complete data compared to conventional internet surveys. Thepaper describes the design principles for agents, markets and logistic decisions. Furthermore we elaborate on the incremental development pathof building a comprehensive agent-based simulation system. We describe the first baseline prototype of the agent based modeling frameworkthat simulates all urban freight transport patterns for an urban area, in the case the agglomeration of Rotterdam. This baseline model applies adata driven simulation approach; future work will consists of further improving this framework with the implementation of discrete choicemodels for logistic decisions.Transport and PlanningTransport and Logistic
De incrementele ontwikkeling van een data-driven agent-gebaseerd simulatiemodel voor goederenvervoer
De ontwikkeling van een agent-gebaseerd simulatiemodel voor goederenvervoer is complex en vraagt veel data. In deze bijdrage beschrijven we de incrementele ontwikkeling van een agent-gebaseerd simulatiemodel voor goederenvervoer, waarin een zendingen-gebaseerde aanpak gevolgd wordt en het gedrag van individuele bedrijven gesimuleerd wordt. Kenmerkend voor de aanpak is het gebruik van een nieuwe gedetailleerde dataverzameling voor wegvervoer (XML-bestanden). Om de complexiteit van het simulatieraamwerk te beheersen wordt een incrementele ontwikkeling gevolgd. In deze bijdrage is het eerste werkende prototype van het model beschreven: deze is uitgewerkt voor al het vrachtverkeer van en naar Rotterdam. De uitkomsten van dit prototype illustreert de beoogde aanpak en kunnen al bruikbaar zijn als een gedetailleerd en representatief beeld van het vrachtverkeer in het studiegebied. In de volgende versies van het model zullen logistieke keuzes aan het model worden toegevoegd, en stapsgewijs de dimensies worden uitgebreid: er worden nieuwe locatiekenmerken toegevoegd voor logistieke knopen, het studiegebied gaat worden vergroot en de agent-rollen worden uitgebreid met logistieke dienstverleners en eigen vervoerders.Transport and PlanningTransport and Logistic
Performance and intrusiveness of crowdshipping systems: An experiment with commuting cyclists in The Netherlands
Crowdshipping systems are receiving increasing attention in both industry and academia. Different aspects of crowdshipping (summarized as platform, supply, and demand) are investigated in research. To date, the mutual influence of crowdshipping platform design and its supply side (with participating crowdshippers) has not yet been thoroughly investigated. This paper addresses this mutual influence by investigating the relations between shipping performance and intrusiveness to daily trips of commuters who voluntarily act as cycle couriers. In an experiment in The Hague, cyclists were asked to transport small parcels during a simulated daily commuting routine. The grid of commuting trips acted as a relay network to move parcels to their individual destinations. All the movements of the parcels were recorded by GPS trackers. The analysis indicates that a higher degree of complexity of rules in crowdshipping systems can lead to better system performance. Meanwhile, it also imposes higher intrusiveness, as participants need to deviate more from their routines of daily, uninterrupted trips. The case also suggests that a well-designed crowdshipping system can increase system performance without having to ask too much from crowdshippers. This study provides reference to better design such systems, and opens up directions for further research that can be used to provide thorough guidelines for the implementation of crowdshipping platforms.Laboratory Transport and PlanningTransport and PlanningTransport and Logistic
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