Evolution over time of heavy vehicle volume in toll roads: A dynamic panel data to identify key explanatory variables in Spain

Gómez Sánchez, Juan and Vassallo Magro, José Manuel (2015). Evolution over time of heavy vehicle volume in toll roads: A dynamic panel data to identify key explanatory variables in Spain. "Transportation Research Part A: Policy and Practice", v. 74 ; pp. 282-297. ISSN 0965-8564. https://doi.org/10.1016/j.tra.2015.02.017.

Description

Title: Evolution over time of heavy vehicle volume in toll roads: A dynamic panel data to identify key explanatory variables in Spain
Author/s:
  • Gómez Sánchez, Juan
  • Vassallo Magro, José Manuel
Item Type: Article
Título de Revista/Publicación: Transportation Research Part A: Policy and Practice
Date: April 2015
ISSN: 0965-8564
Volume: 74
Subjects:
Freetext Keywords: Heavy vehicle traffic; Road freight; Toll road; Demand elasticities; Dynamic panel data; Spain
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Transporte y Territorio
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Improving the knowledge of demand evolution over time is a key aspect in the evaluation of transport policies and in forecasting future investment needs. It becomes even more critical for the case of toll roads, which in recent decades has become an increasingly common device to fund road projects. However, literature regarding demand elasticity estimates in toll roads is sparse and leaves some important aspects to be analyzed in greater detail. In particular, previous research on traffic analysis does not often disaggregate heavy vehicle demand from the total volume, so that the specific behavioral patternsof this traffic segment are not taken into account. Furthermore, GDP is the main socioeconomic variable most commonly chosen to explain road freight traffic growth over time. This paper seeks to determine the variables that better explain the evolution of heavy vehicle demand in toll roads over time. To that end, we present a dynamic panel data methodology aimed at identifying the key socioeconomic variables that explain the behavior of road freight traffic throughout the years. The results show that, despite the usual practice, GDP may not constitute a suitable explanatory variable for heavy vehicle demand. Rather, considering only the GDP of those sectors with a high impact on transport demand, such as construction or industry, leads to more consistent results. The methodology is applied to Spanish toll roads for the 1990?2011 period. This is an interesting case in the international context, as road freight demand has experienced an even greater reduction in Spain than elsewhere, since the beginning of the economic crisis in 2008.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainTRA 2012-36590UnspecifiedUnspecifiedUnspecified

More information

Item ID: 36371
DC Identifier: http://oa.upm.es/36371/
OAI Identifier: oai:oa.upm.es:36371
DOI: 10.1016/j.tra.2015.02.017
Official URL: http://www.sciencedirect.com/science/article/pii/S0965856415000427
Deposited by: Memoria Investigacion
Deposited on: 02 Jul 2015 09:36
Last Modified: 31 May 2019 15:53
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