Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Ex-post environmental and traffic assessment of a speed reduction strategy in Madrid's inner ring-road
Year:2017
Research Areas
  • Transport
Information
Abstract
Since urban traffic is a major source of CO2 and NOx emissions, cities play a key role averting climate change and combating air pollution. Most researchers agree on the need of designing comprehensive mitigation strategies instead of applying isolated measures. Nevertheless, it is important to understand the specific impact and scope of each measure to look for the most effective synergies among them. In 2004, the Madrid City Council launched a plan to re-design its inner ring-road to move traffic out of the city centre. For safety reasons the planned speed limit for the full-renovated South-West sectionwas finally reduced from 90 km/h to 70 km/h. Besides contributing to traffic safety, this strategy could also be seen as positive to the environment due to the associated reduced fuel consumption and lower emissions. However, lower speed limits have lower rates of community acceptance due to its impact on average travel times at the individual level. This paper conducts an ex-post evaluation of this speed reduction strategy to explore its environmental and traffic performance impacts. The results support the thesis that, in this velocity range, lower speed limits present important opportunities for reducing GHG and air pollution in the section affected by the measure, without substantially altering traffic performance. The implementation of the new speed limit policy produces a 14.4% and 16.4% reduction in CO2 and NOx emissions respectively, while global travel time remains virtually constant and the saturation rate decreases slightly. Besides, this cost-effectivemeasure reveals great potential to reduce air pollution in highly populated urban areas located next to urban highways. Thiswork provides local policy makers and city managers with useful insights regarding potential co-benefits of traffic optimization and speed reduction management to reduce mobile source emissions in urban environments.
International
Si
JCR
Si
Title
Journal of Transport Geography
ISBN
0966-6923
Impact factor JCR
2,214
Impact info
Datos JCR del año 2013
Volume
Journal number
58
From page
256
To page
268
Month
ENERO
Ranking
Participants
  • Autor: Fiamma Perez Prada (UPM)
  • Autor: Andres Monzon De Caceres (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Planificación del Transporte
  • Centro o Instituto I+D+i: Centro de Investigación del Transporte
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)