Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles

Detalhes bibliográficos
Autor(a) principal: Bastos Silva, Ana Maria César
Data de Publicação: 2018
Outros Autores: Vasconcelos, António Luís Pimentel, Almeida, Raul Tomás de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/107999
https://doi.org/10.7307/ptt.v30i2.2573
Resumo: It is well known that road accidents tend to be more frequent in locations where a sudden change in road characteristics violates the driver's expectations. Most methods used to assess the design consistency are based on simplified speed profiles that give a coarse description of the vehicle dynamics along the road. This paper presents a new approach to quantify the road design consistency, based on continuous operating speed profiles. These profiles are based on the Gipps’ car-following equations, adapted to simulate the driver behaviour in the vicinity of horizontal curves under free-flow conditions. A methodology to calibrate and validate the Gipps’ behavioural parameters from field data is presented and applied to predict the speed profiles of three drivers for a set of rural road segments. The calibration is based on trajectory data collected with an instrumented vehicle and it follows an automated procedure that aims to minimize the differences between the predicted and observed speed profiles. The new consistency index is based on the deceleration distances and it allows to overcome some limitations of the existing methods.
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spelling Design Consistency Index for Two-lane Roads based on Continuous Speed ProfilesAvaliação da consistência do traçado de es-tradas interurbanas com base em perfis de velocidade contínuosdesign consistencyspeed profilesroad safetyoperating speedaccelerationdecelerationGippsconsistência de traçadoperfis de velocidadesegurança rodoviáriavelocidade operacionalaceleraçãodesaceleraçãoGippsIt is well known that road accidents tend to be more frequent in locations where a sudden change in road characteristics violates the driver's expectations. Most methods used to assess the design consistency are based on simplified speed profiles that give a coarse description of the vehicle dynamics along the road. This paper presents a new approach to quantify the road design consistency, based on continuous operating speed profiles. These profiles are based on the Gipps’ car-following equations, adapted to simulate the driver behaviour in the vicinity of horizontal curves under free-flow conditions. A methodology to calibrate and validate the Gipps’ behavioural parameters from field data is presented and applied to predict the speed profiles of three drivers for a set of rural road segments. The calibration is based on trajectory data collected with an instrumented vehicle and it follows an automated procedure that aims to minimize the differences between the predicted and observed speed profiles. The new consistency index is based on the deceleration distances and it allows to overcome some limitations of the existing methods.Verifica-se que os acidentes rodoviários tendem a ser mais frequentes em locais onde uma mudança abrupta nas características da estrada viola as expectativas naturais do condutor. A maioria dos métodos utilizados para avaliar a homogeneidade do traçado é baseada em perfis de velocidades simplistas que fornecem uma descrição rudimentar da dinâmica do veículo ao longo da estrada. Este artigo apresenta uma nova abordagem para avaliar a homogeneidade do traçado, com base em perfis de velocidades contínuos. Esses perfis baseiam-se no modelo de car-following de Gipps, adaptado para simular o comportamento do condutor na aproximação de curvas horizontais em regime livre de circulação. A metodologia usada para calibrar e validar os parâmetros comportamentais do modelo de Gipps a partir de dados de campo é apresentada e aplicada para avaliar os perfis de velocidades de três condutores em vários segmentos de uma estrada interurbana. A calibração tem por base as características geométricas obtidas com recurso a um veículo instrumentado e segue um procedimento automatizado que visa minimizar as diferenças entre os perfis de velocidades simulados e observados. O indicador de homogeneidade é baseado nas distâncias de desaceleração, permitindo ultrapassar algumas das limitações dos métodos existentes.Sveuciliste u Zagrebu2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/107999http://hdl.handle.net/10316/107999https://doi.org/10.7307/ptt.v30i2.2573eng1848-40690353-5320Bastos Silva, Ana Maria CésarVasconcelos, António Luís PimentelAlmeida, Raul Tomás deinfo: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:RCAAP2023-08-04T08:43:15Zoai:estudogeral.uc.pt:10316/107999Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:24:16.296231Repositório 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 Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
Avaliação da consistência do traçado de es-tradas interurbanas com base em perfis de velocidade contínuos
title Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
spellingShingle Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
Bastos Silva, Ana Maria César
design consistency
speed profiles
road safety
operating speed
acceleration
deceleration
Gipps
consistência de traçado
perfis de velocidade
segurança rodoviária
velocidade operacional
aceleração
desaceleração
Gipps
title_short Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
title_full Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
title_fullStr Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
title_full_unstemmed Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
title_sort Design Consistency Index for Two-lane Roads based on Continuous Speed Profiles
author Bastos Silva, Ana Maria César
author_facet Bastos Silva, Ana Maria César
Vasconcelos, António Luís Pimentel
Almeida, Raul Tomás de
author_role author
author2 Vasconcelos, António Luís Pimentel
Almeida, Raul Tomás de
author2_role author
author
dc.contributor.author.fl_str_mv Bastos Silva, Ana Maria César
Vasconcelos, António Luís Pimentel
Almeida, Raul Tomás de
dc.subject.por.fl_str_mv design consistency
speed profiles
road safety
operating speed
acceleration
deceleration
Gipps
consistência de traçado
perfis de velocidade
segurança rodoviária
velocidade operacional
aceleração
desaceleração
Gipps
topic design consistency
speed profiles
road safety
operating speed
acceleration
deceleration
Gipps
consistência de traçado
perfis de velocidade
segurança rodoviária
velocidade operacional
aceleração
desaceleração
Gipps
description It is well known that road accidents tend to be more frequent in locations where a sudden change in road characteristics violates the driver's expectations. Most methods used to assess the design consistency are based on simplified speed profiles that give a coarse description of the vehicle dynamics along the road. This paper presents a new approach to quantify the road design consistency, based on continuous operating speed profiles. These profiles are based on the Gipps’ car-following equations, adapted to simulate the driver behaviour in the vicinity of horizontal curves under free-flow conditions. A methodology to calibrate and validate the Gipps’ behavioural parameters from field data is presented and applied to predict the speed profiles of three drivers for a set of rural road segments. The calibration is based on trajectory data collected with an instrumented vehicle and it follows an automated procedure that aims to minimize the differences between the predicted and observed speed profiles. The new consistency index is based on the deceleration distances and it allows to overcome some limitations of the existing methods.
publishDate 2018
dc.date.none.fl_str_mv 2018
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/10316/107999
http://hdl.handle.net/10316/107999
https://doi.org/10.7307/ptt.v30i2.2573
url http://hdl.handle.net/10316/107999
https://doi.org/10.7307/ptt.v30i2.2573
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1848-4069
0353-5320
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Sveuciliste u Zagrebu
publisher.none.fl_str_mv Sveuciliste u Zagrebu
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
repository.mail.fl_str_mv
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