Table of Contents
ISRN Civil Engineering
Volume 2012, Article ID 984758, 13 pages
Research Article

Analysis of the Technical Efficiency of Urban Bus Services in Spain Based on SBM Models

1Universidad Politécnica de Madrid, Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos, 28040 Madrid, Spain
2TRANSyT-Transport Research Centre, Universidad Politécnica de Madrid, 28040 Madrid, Spain

Received 29 February 2012; Accepted 8 May 2012

Academic Editor: J. D. Nelson

Copyright © 2012 Pablo Jordá et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


During the first decade of the new millennium, fueled by the economic development in Spain, urban bus services were extended. Since the years 2008 and 2009, the root of the economic crisis, the improvement of these services is at risk due to economic problems. In this paper, the technical efficiency of the main urban bus companies in Spain during the 2004–2009 period are studied using SBM (slack-based measures) models and by establishing the slacks in the services' production inputs. The influence of a series of exogenous variables on the operation of the different services is also analyzed. It is concluded that only the 24% of the case studies are efficient, and some urban form variables can explain part of the inefficiency. The methodology used allows studying the inefficiency in a disaggregated way that other DEA (data envelopment analysis) models do not.