The development of river-based intermodal transport: the case of Ukraine

It should be noted that the (inland waterway transport) IWT in Ukraine currently is in its infancy in comparison with other land based transport means (rail and road) and with other countries that possess navigable rivers. This paper is an extension of the research initiated by Grushevska and Notteboom (2015) where the concepts of intermediacy and centrality were introduced in order to assess the role of Ukraine in the global and regional transport networks. The list of key obstacles for Ukraine’s intermediacy function included IWT related barriers such as: (i) deficient inland waterway infrastructure, (ii) high IWT costs (fees for bridges, locks etc.) and (iii) pilotage charges. To date the transportation to/from ports is mainly fulfilled by road or by rail based multimodal transport solutions. We present the unutilized potential of Ukrainian IWT that needs to be efficiently exploited for the benefit of the national economy and national transport system. This study intends to enrich the limited academic research on IWT systems in a transition stage, as exemplified by the case of Ukraine

Evolutionary urban transportation planning? An exploration

For urban transportation planners these are challenging times. Mounting practical concerns are mirrored by more fundamental critiques. The latter come together in the observation that conventional approaches do not adequately account for the irreducible uncertainty of future developments. The central aim of this paper is to explore if and how an evolutionary approach can help overcome this limit. Two core-hypotheses are formulated. The first is that the urban transportation system behaves in an evolutionary fashion. The second hypothesis is that because of this, urban transportation planning needs also to focus on enhancing the resilience and adaptability of the system. Changes in transport and land use development patterns and policies and in the broader context in the post-war period in the Amsterdam region are analysed in order to illustrate the two core-hypotheses. In the conclusions more general implications are drawn.evolutionary economics, urban economics, transportation planning

Routing design for less-than-truckload motor carriers using ant colony techniques

One of the most important challenges for Less-Than-Truck-Load carriers consists of determining how to consolidate flows of small shipments to minimize costs while maintaining a certain level of service. For any origin-destination pair, there are several strategies to consolidate flows, but the most usual ones are: peddling/collecting routes and shipping through one or more break-bulk terminals. Therefore, the target is determining a route for each origin-destination pair that minimizes the total transportation and handling cost guaranteeing a certain level of service. Exact resolution is not viable for real size problems due to the excessive computational time required. This research studies different aspects of the problem and provides a metaheuristic algorithm (based on Ant Colonies Optimization techniques) capable of solving real problems in a reasonable computational time. The viability of the approach has been proved by means of the application of the algorithm to a real Spanish case, obtaining encouraging results

Two-echelon freight transport optimisation: unifying concepts via a systematic review

Multi-echelon distribution schemes are one of the most common strategies adopted by the transport companies in an aim of cost reduction, but their identification in scientific literature is not always easy due to a lack of unification. This paper presents the main concepts of two-echelon distribution via a systematic review, in the specific a meta-narrative analysis, in order to identify and unify the main concepts, issues and methods that can be helpful for scientists and transport practitioners. The problem of system cost optimisation in two-echelon freight transport systems is defined. Moreover, the main variants are synthetically presented and discussed. Finally, future research directions are proposed.location-routing problems, multi-echelon distribution, cross-docking, combinatorial optimisation, systematic review.

Scientific Research about Climate Change Mitigation in Transport : A critical review

Peer reviewedPostprin

ROUTING DESIGN FOR LESS-THAN-TRUCKLOAD MOTOR CARRIERS USING ANT COLONY TECHNIQUES

One of the most important challenges for Less-Than-Truck-Load carriers consists of determining how to consolidate flows of small shipments to minimize costs while maintaining a certain level of service. For any origin-destination pair, there are several strategies to consolidate flows, but the most usual ones are: peddling/collecting routes and shipping through one or more break-bulk terminals. Therefore, the target is determining a route for each origin-destination pair that minimizes the total transportation and handling cost guaranteeing a certain level of service. Exact resolution is not viable for real size problems due to the excessive computational time required. This research studies different aspects of the problem and provides a metaheuristic algorithm (based on Ant Colonies Optimization techniques) capable of solving real problems in a reasonable computational time. The viability of the approach has been proved by means of the application of the algorithm to a real Spanish case, obtaining encouraging results.

Beyond geographic path dependencies: towards a post-structuralist approach of the port-city interface

Technological breakthroughs in the maritime transport industry gave rise to multimodality and global supply chains (Olivier & Slack, 2006). The high competitive character of this maritime transport industry induced transnational corporations (TNCs) to integrate their logistic processes horizontally and vertically. In order to keep attracting these TNCs, ports evolved downstream away from the city, followed by an economic, spatial and most recently by an institutional separation; resulting in less innovation due to the decreasing related variety between maritime and urban economics (Hall & Jacobs, 2012). Other emerging varying conditions are related to the sea level rise which reduces available space were port could further expand, leading to governance dilemmas between economy and ecology. Finally, as the burdens, such as congestion or a decreasing employment rate, are for the region, and the economic benefits are for a small group of TCNs, the ‘license to operate’ has become increasingly complex. The numerous different concepts and models trying to understand these changes are usually based on a historic-morphological approach that can be traced back to the so-called ‘anyport model’ and its modifications (Hoyle, 1989). The theoretical approach of these models is imbedded in structuralism and tries to generalize the observed evolution of the port city complex. An increasing number of researchers critiques the mainstream theories and their ambition for building universal understanding. Researchers emphasize the importance of the port city interface and its related variety. Therefore they point out the risk of facilitating the multidimensional separation by using a wrong assumption and a lack of understanding local processes with a global outlook. To tackle this risk, we have to move beyond this lock-in (Boelens & de Roo, 2014). There is a need to move towards a post-structural perspective of the port city interface, resulting in a more complex, actor-relational and co-evolving approach. This paper is the first step of a four year PhD-research on the theme of the port city interface. In the first part a literature framework is proposed of the previous research about the subject, questioning if existing studies have to be more attuned to regional and local characteristics. The second section focuses on the post-structuralist approach and explores its potential application for the study of the port city complexes. It will illustrate recent ideas of co-evolution and actor networks (Boelens & de Roo, 2014) applied on case studies in Belgium

The promise of air cargo: System aspects and vehicle design

The current operation of the air cargo system is reviewed. An assessment of the future of air cargo is provided by: (1) analyzing statistics and trends, (2) by noting system problems and inefficiencies, (3) by analyzing characteristics of 'air eligible' commodities, and (4) by showing the promise of new technology for future cargo aircraft with significant improvements in costs and efficiency. The following topics are discussed: (1) air cargo demand forecasts; (2) economics of air cargo transport; (3) the integrated air cargo system; (4) evolution of airfreighter design; and (5) the span distributed load concept