Driving around turbo-roundabouts vs. conventional roundabouts: Are there advantages regarding pollutant emissions?
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
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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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 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Taylor & Francis |
publisher.none.fl_str_mv |
Taylor & Francis |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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