Environmental Effect of Bus Priority Measures Applied on a Road Network in Santiago, Chile

Xenia Karekla*, Rodrigo Fernandez, Nick Tyler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Air pollution is at the highest levels ever and there is currently a worldwide initiative by transport engineers and urban planners to redesign public transport modes and cities to become more sustainable and environmentally friendly. The environmental impact of everyday activities is more apparent in developing cities which take longer to adapt to advanced methods of running public transport modes. This study aims to investigate the reduction of bus energy consumption and carbon emissions through bus priority measures in a bus route in the city of Santiago, Chile. Two bus priority schemes are tested in this study: Bus Only Lanes and Bus Signal Priority. The microscopic traffic simulator TSIS-CORSIM is used to quantify the environmental impact of these schemes. The results have shown that both schemes lead to lower fuel consumption and emissions, especially for the bus service. The environmental improvements are mostly apparent at traffic flows below 1000 veh/h, with clear benefits for both the bus service and passenger cars when dedicated bus lanes are included in the road infrastructure.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalTransportation Research Record
Issue number8
StatePublished - 1 Dec 2018

Bibliographical note

Funding Information:
This is a preliminary work done for the “City-Wide Analysis to Propel Cities towards Resource Efficiency and Better Wellbeing” project, which is part of the Chinese Low Carbon Cities Development and is funded by EPSRC (EP/N010779/1). The authors would like to thank Redbus Urbano for their help in providing the necessary data for this study.

Publisher Copyright:
© National Academy of Sciences: Transportation Research Board 2018.


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