Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?

Detalhes bibliográficos
Autor(a) principal: Fernandes, Paulo
Data de Publicação: 2016
Outros Autores: Pereira, S. R., Bandeira, J. M., Vasconcelos, Luís, Bastos Silva, Ana
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.19/3157
Resumo: This paper addresses the impact of turbo-roundabouts located in urban areas on pollutant emissions using field measurements of vehicle activity data and road congestion levels. The research also compares the emissions of vehicles moving along a turbo-roundabout and a conventional multi-lane roundabout. Based on field measurements taken at turbo-roundabouts without curb dividers located in Grado (Spain) and multi-lane roundabouts in Aveiro (Portugal), three representative speed profiles for each speed trajectory were identified: no stop (I), stop once (II), and multiple stops (III). This study also develops discrete models for turbo-roundabouts and multi-lane roundabouts in which the relative occurrence of those speed profiles is expressed as a function of the entry and conflicting traffic flows. The Vehicle Specific Power (VSP) methodology is then employed to estimate second-by-second pollutant emissions. This study tests the hypotheses that emissions are impacted by the differences in: 1) the characteristics of speed profiles in each movement; 2) the volumes of entry and conflicting flows; 3) the overall saturation level; and 4) the transportation facility considered (turbo-roundabout /multi-lane roundabout). Considering the selected case studies and traffic demands, vehicles at turbo-roundabouts generated more emissions (15-22%, depending on the pollutant) than multi-lane conventional roundabouts, especially under medium and high congested levels. These findings suggest that there are no advantages in implementing turbo-roundabouts from an environmental point of view, even in no saturated conditions.
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spelling Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?Turbo-roundaboutsMulti-lane roundaboutsSpeed ProfilesDiscrete ModelsEmissionsThis paper addresses the impact of turbo-roundabouts located in urban areas on pollutant emissions using field measurements of vehicle activity data and road congestion levels. The research also compares the emissions of vehicles moving along a turbo-roundabout and a conventional multi-lane roundabout. Based on field measurements taken at turbo-roundabouts without curb dividers located in Grado (Spain) and multi-lane roundabouts in Aveiro (Portugal), three representative speed profiles for each speed trajectory were identified: no stop (I), stop once (II), and multiple stops (III). This study also develops discrete models for turbo-roundabouts and multi-lane roundabouts in which the relative occurrence of those speed profiles is expressed as a function of the entry and conflicting traffic flows. The Vehicle Specific Power (VSP) methodology is then employed to estimate second-by-second pollutant emissions. This study tests the hypotheses that emissions are impacted by the differences in: 1) the characteristics of speed profiles in each movement; 2) the volumes of entry and conflicting flows; 3) the overall saturation level; and 4) the transportation facility considered (turbo-roundabout /multi-lane roundabout). Considering the selected case studies and traffic demands, vehicles at turbo-roundabouts generated more emissions (15-22%, depending on the pollutant) than multi-lane conventional roundabouts, especially under medium and high congested levels. These findings suggest that there are no advantages in implementing turbo-roundabouts from an environmental point of view, even in no saturated conditions.Taylor & FrancisRepositório Científico do Instituto Politécnico de ViseuFernandes, PauloPereira, S. R.Bandeira, J. M.Vasconcelos, LuísBastos Silva, Ana2016-04-13T10:58:10Z2016-04-082016-04-08T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.19/3157engP. Fernandes, S. R. Pereira, J. M. Bandeira, L. Vasconcelos, A. Bastos Silva & M. C. Coelho (2016): Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?, International Journal of Sustainable Transportation, DOI: 10.1080/15568318.2016.11684971556-833410.1080/15568318.2016.1168497metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-01-16T15:26:29Zoai:repositorio.ipv.pt:10400.19/3157Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:42:13.524338Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
title Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
spellingShingle Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
Fernandes, Paulo
Turbo-roundabouts
Multi-lane roundabouts
Speed Profiles
Discrete Models
Emissions
title_short Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
title_full Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
title_fullStr Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
title_full_unstemmed Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
title_sort Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
author Fernandes, Paulo
author_facet Fernandes, Paulo
Pereira, S. R.
Bandeira, J. M.
Vasconcelos, Luís
Bastos Silva, Ana
author_role author
author2 Pereira, S. R.
Bandeira, J. M.
Vasconcelos, Luís
Bastos Silva, Ana
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico de Viseu
dc.contributor.author.fl_str_mv Fernandes, Paulo
Pereira, S. R.
Bandeira, J. M.
Vasconcelos, Luís
Bastos Silva, Ana
dc.subject.por.fl_str_mv Turbo-roundabouts
Multi-lane roundabouts
Speed Profiles
Discrete Models
Emissions
topic Turbo-roundabouts
Multi-lane roundabouts
Speed Profiles
Discrete Models
Emissions
description This paper addresses the impact of turbo-roundabouts located in urban areas on pollutant emissions using field measurements of vehicle activity data and road congestion levels. The research also compares the emissions of vehicles moving along a turbo-roundabout and a conventional multi-lane roundabout. Based on field measurements taken at turbo-roundabouts without curb dividers located in Grado (Spain) and multi-lane roundabouts in Aveiro (Portugal), three representative speed profiles for each speed trajectory were identified: no stop (I), stop once (II), and multiple stops (III). This study also develops discrete models for turbo-roundabouts and multi-lane roundabouts in which the relative occurrence of those speed profiles is expressed as a function of the entry and conflicting traffic flows. The Vehicle Specific Power (VSP) methodology is then employed to estimate second-by-second pollutant emissions. This study tests the hypotheses that emissions are impacted by the differences in: 1) the characteristics of speed profiles in each movement; 2) the volumes of entry and conflicting flows; 3) the overall saturation level; and 4) the transportation facility considered (turbo-roundabout /multi-lane roundabout). Considering the selected case studies and traffic demands, vehicles at turbo-roundabouts generated more emissions (15-22%, depending on the pollutant) than multi-lane conventional roundabouts, especially under medium and high congested levels. These findings suggest that there are no advantages in implementing turbo-roundabouts from an environmental point of view, even in no saturated conditions.
publishDate 2016
dc.date.none.fl_str_mv 2016-04-13T10:58:10Z
2016-04-08
2016-04-08T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.19/3157
url http://hdl.handle.net/10400.19/3157
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv P. Fernandes, S. R. Pereira, J. M. Bandeira, L. Vasconcelos, A. Bastos Silva & M. C. Coelho (2016): Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?, International Journal of Sustainable Transportation, DOI: 10.1080/15568318.2016.1168497
1556-8334
10.1080/15568318.2016.1168497
dc.rights.driver.fl_str_mv metadata only access
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rights_invalid_str_mv metadata only access
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dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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