Sanchez-Borras M.,Center for Innovation in Transport |
Robuste F.,Polytechnic University of Catalonia |
Criado O.,Center for Innovation in Transport
Transportation Research Record | Year: 2011
The Spanish high-speed railway (HSR) network has developed swiftly over the past few years. In less than two decades, this network has already become the second longest in Europe and the third in the world ranking, and the network continues to grow. Given this situation and given that the Spanish HSR system is considered by several governments as an example to follow, the authors of this paper analyzed whether the Spanish case could be considered an example of success in terms of HSR and whether some Spanish practices could be improved on. A thorough analysis presents the Spanish HSR network in terms of its use, competitiveness with air travel, environmental and territorial impacts, and profitability and costs. The results of this analysis allowed conclusions to be drawn regarding the success of the Spanish HSR and some recommendations to be made for decision makers planning the construction of a high-speed line.
Morales-Fusco P.,Center for Innovation in Transport |
Morales-Fusco P.,University of Barcelona |
Sauri S.,Center for Innovation in Transport |
Sauri S.,University of Barcelona |
Lago A.,University of Navarra
Journal of Transport Geography | Year: 2012
This paper analyzes how the strategy taken by the cargo carrier when using motorways of the sea (understood as regular roll on/roll off short sea shipping lines) affects the competitiveness of the shipping line. Five different strategies were analyzed and grouped into three main types: road door-to-door transportation, road and sea transportation combined with a driver always accompanying the cargo and road and sea transportation where the cargo travels unaccompanied. The analysis provides formulae to calculate the economical and temporal cost differences from using a sea link in distribution and assesses the risk and investments necessary to maximize the profit for each strategy. The paper ends identifying the critical points affecting the competitiveness of short sea shipping roll on/roll off lines and proposes policies that could help in its development and success. © 2012 Elsevier Ltd.
Galati A.,University of Palermo |
Siggia D.,University of Palermo |
Siggia D.,Parliament |
Crescimanno M.,University of Palermo |
And 4 more authors.
British Food Journal | Year: 2016
Purpose – The purpose of this paper is to analyse the economic benefits of short sea shipping (SSS) in the shape of Motorways of the Sea (MoS) compared to road transport. The study cover a gap in agro-food economics and analyses the economic benefits of sea transport mode compared to road transport in the food trade between Spain and Italy for a specific product: olive oils. Design/methodology/approach – Three different transportation scenarios are considered (road only, road combined with accompanied SSS and road combined with unaccompanied SSS) linking the main olive oil production and consumption areas in Spain and Italy. In each scenario the cost per unit shipped have been calculated. Findings – The results show the road option is about 30 and 34 per cent more costly than the best SSS option available for the exportations from Jaén and Southern Catalonia, respectively. Research limitations/implications – The need of further research is identified, mainly focused in two directions: first, the need for inclusion of new variables to the model (e.g. value of time, seasonality, complexity of the transport chain, potential demand, etc.) to better assess the competitiveness of the sea connection and, second, a study of the environmental impact and socio-economic benefits of SSS implementation for the agri-food sector. Originality/value – The research enriches the current literature on this field and provides a basis for future studies. In particular, it corroborates the strategic decisions taken in the framework of European transport policy demonstrating a greater economic sustainability of SSS, and more specifically MoS, compared to the road transport. © 2016, © Emerald Group Publishing Limited.
Roca-Riu M.,Center for Innovation in Transport |
Estrada M.,Center for Innovation in Transport |
Estrada M.,Polytechnic University of Catalonia |
Trapote C.,Center for Innovation in Transport
Transportation Research Part A: Policy and Practice | Year: 2012
This paper proposes a bilevel formulation for solving the Bus Network Design Problem (BNDP) of interurban services entering a major city. It is focused in interurban services because it is a growing problem in most of major cities, yet new in the literature. The layout of interurban bus routes and the locations of transfer stations in the main city are the key factors to provide a competitive public transportation service to commuters in a metropolitan area. The number of commuters in huge urban concentrations is growing due to the difficulties of living near the city center. The objective function of the first level is defined with the aim of reducing user and agency costs. In the second level the performance of users is addressed. Furthermore, a local search method based on the Tabu Search algorithm was carried out to guide the exploration in the solution domain. The results obtained in a set of test problems have demonstrated that the restart parameters of the algorithm play a significant role in the efficiency of the algorithm. Finally, implementation in the large network of Barcelona (Spain) reduces the total cost by 5% with regard to the present situation. © 2012 Elsevier Ltd.
Estrada M.,Center for Innovation in Transport |
Robuste F.,Center for Innovation in Transport |
Amat J.,Center for Innovation in Transport |
Badia H.,Center for Innovation in Transport |
Barcelo J.,Center for Innovation in Transport
Transportation Research Record | Year: 2012
This paper examines the design of high-performance transit networks that minimize transit agency costs, the time of transit users in the system, and the travel time of car users. Surface transit services need segregated lanes to achieve a target cruising speed so that the transit network length has a significant effect on traffic performance. This effect is modeled with the macroscopic fundamental diagram (MFD). The optimization proceeds in two steps. First, an analytic model defines the optimal layout of surface transit networks according to the time headway, stop spacing, line spacing, and network size variables. Then, the average travel time of the traffic network is evaluated with the MFD curve corresponding to the former transit network length. The full methodology has been implemented in the city of Barcelona, Spain. MFD was calibrated in the city's central district by means of traffic microsimulation runs. The social optimum for the number of corridors is 15, somewhat smaller than the optimization that does not consider traffic (23 corridors).