Artigos de Revista
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Safety effects of low-cost engineering measures. An observational study in a Portuguese multilane road
Single carriageway multilane roads are not, in general, a very safe type of road, mainly because of the high number of seriously injured victims in head-on collisions, when compared with dual carriageway multilane roads, with a median barrier.In this paper the results of a study on the effect of the application of several low cost engineering measures, aimed at road infrastructure correction and road safety improvement on a multilane road EN6), are presented. The study was developed by the National Laboratory of Civil Engineering (LNEC) for the Portuguese Road Administration and involved a comparison of selected aspects of motorized trafficbehaviour (traffic volumes and speeds) measured in several sections of EN6, as well as monitoring of road safety developments in the same road. The applied low cost engineering measures allowed a reductionof 10% in the expected annual number of personal injury accidents and a 70% decrease in the expected annual number of head-on collisions; the expected annual frequency of accidents involving killed and seriously injured persons was reduced by 26%.
Ano: 2012
Número Páginas:
7.
Autor(es): Vieira Gomes, S.; Cardoso, J. L.
Revista: Accident Analysis and Prevention
Editor: Elsevier
Volume:
Volume 48.
Keywords: Road safety; Low-cost engineering measures; Median; Before
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The influence of the infrastructure characteristics in urban road accidents occurrence
This paper summarizes the result of a study which contributes to the improvement of road safety in urban areas, through the creation of tools that can be used in intervention methods in the planning and management of road networks.The first tool relates the creation of a geocoded database of road accident occurred in Lisbon between 2004 and 2007, which allowed the definition of digital maps, with the possibility of a wide range of consultations and crossing of information.The second tool concerns the development of models to estimate the frequency of accidents on urban networks, according to different desegregations: road element (intersections and segments); type ofaccident; and inclusion of explanatory variables related to the road environment.
Ano: 2012
Número Páginas:
11.
Autor(es): Vieira Gomes, S.
Revista: Accident Analysis & Prevention
Editor: Elsevier
Volume:
Volume 48.
Keywords: Urban segments; Urban intersections; Accident prediction models; Gis
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An Alternative Revealed Preference Approach for Valuing Traffic Noise Indoors: using ex ante ande ex post choices of apartments
The research reported in this paper is based on a hypothetical revealed preference experiment for valuing traffic noise nuisance as perceived in the interior of apartments located in Lisbon. The experiment used both the observed behavior of householders
Ano: 2011
Número Páginas:
7p.
Autor(es): Arsénio, E.
Revista: Proceedings of the INTERNOISE 2011 "Sound Environment and a Global Issue"
Editor: I-INCE (International Institute of Noise Control Engineering)
Keywords: Costs and benefits; Traffic noise; Random parameters logit model; Economic valuation
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Bayesian Models for the Detection of High Risk Locations on Portuguese Motorways
Hierarchical Bayesian regression models, with differing hyper-prior distributions, are considered as accident prediction models to be fitted on data collected over several years on the Portuguese motorway network. A sensitivity analysis is performed by way of simulation to investigate the practical implications of the choice of informative hyper-priors (Gamma, Christiansen and Uniform) and non-informative Gamma, as well as various sample sizes and years of aggregated data, on the results of a road safety analysis, in particular, at detecting high accident risk locations. It was concluded that informative hyper-priors were best at detecting hotspots when small sample sizes were considered. For bigger samples the various hyper-priors produced equivalent outcomes. Furthermore, more accurate results were obtained when more years of data were analyzed.
Ano: 2011
Número Páginas:
10.
Autor(es): Azeredo Lopes, S.; Cardoso, J. L.
Revista: Applications of Statistics and Probability in Civil Engineering
Editor: Taylor & Francis Group
Keywords: Accident prediction models; High accident risk locations; Hierarchical regression models; Bayesian analysis
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Promoting Walking and Cycling for Setting Local Carbon Markets: a case study in Portugal
In several cities around the world, measures have been taken to encourage and promote walking and cycling, herein designated as soft mobility modes, which had a high success and contributed to a more sustainable transport system. Within the European context, Portugal has one of the lowest modal split shares of walking and cycling. This is mainly the result of several decades of a transport planning process oriented to road transport infrastructures
Ano: 2009
Número Páginas:
20 p..
Autor(es): Viegas, F.; Arsénio, E.; Neves, J.
Editor: AET
Keywords: Método de preferências declaradas; Modos de transporte suaves; Mercados de carbono; Mobilidade sustentável
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What can be learnt from stated choice experiments in transport noise valuation?
Although stated choice applications to the valuation of transport noise remain novel, there is now a growing body of evidence from which to draw insights into the results and the appropriateness of the methodological approach. This paper draws on the evidence available, which includes four studies by the authors utilising stated choice experiments to value aircraft noise at Lyon, Manchester and Athens airports and road traffic noise in Edinburgh and Lisbon and other key studies.
Ano: 2009
Número Páginas:
10 pag.
Autor(es): Bristow, A.; Wardman, M.; Arsénio, E.; Thanos, S.
Keywords: Aviation noise externalties; Stated preference methods
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The use of international data on fuel sales and vehicle fleet for the estimation of yearly national traffic volumes
International comparisons are frequently used to assess the road safety performance of a country or to monitor its development over time, at a national or regional level. In most instances either accident or injury risks have to be considered, which results in the need for a quantitative estimation of the amount of travel, namely traffic volumes. Only in special cases may risks be indirectly compared using methods of induced exposure.The required data on traffic volumes is not always readily available. This is especially true if old data or data from several countries for a long period are to be used, as in comparative time series analysis. Several simplifying assumptions can be adopted to bypass this lack of data but often the estimates resulting from these simple assumptions are not entirely satisfactory.Between 1996 and 1998 the European Union (EU) sponsored, within the scope of the 4th Research Framework Programme, a COST Action (COST 329) to analyse and establish a common methodological framework for description and analysis of safety developments
Ano: 2005
Número Páginas:
207-215.
Autor(es): Cardoso, J. L.
Revista: Accident Analysis and Prevention
Editor: Elsevier
Volume:
37.
Keywords: Traffic volume; Accident risk; Road Safety
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Comunicações
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Avaliação de acidentes em travessias pedestres para identificação de fatores de risco utilizando redes neurais artificiais
Este trabalho analisa acidentes envolvendo pedestres em travessias urbanas, buscando identificar fatores de risco e propor medidas de mitigação com base em modelos de previsão de acidentes (MPAs). A pesquisa recorre a Redes Neurais Artificiais (RNA) aplicadas a uma base de dados da Autoridade Nacional de Segurança Rodoviária (ANSR) referente ao período de 2017 a 2021. Embora os modelos apresentem alta taxa de acerto, o poder discriminativo foi limitado pela predominância de casos de feridos leves (92%). Os principais fatores de risco apontados envolvem falhas na sinalização luminosa, iluminação noturna insuficiente, más condições de bermas e pavimento, além de limites de velocidade elevados em zonas urbanas. A comparação entre os períodos pré-COVID19 e COVID19 revela redução significativa no número de acidentes e alterações no perfil etário das vítimas mortais. Como trabalho futuro, recomenda-se a exploração de outros algoritmos de machine learning para melhor lidar com a distribuição desequilibrada dos dados e aprimorar a identificação dos fatores críticos associados à sinistralidade pedonal.
Ano: 2024
Autor(es): Santos, B.; Gonçalves, J.; Amin, S.; Vieira, S.; Lopes, C.
Editor: ASSEAVA
Keywords: Travessias de pedestres; Redes neuronais artificiais; Segurança rodoviária
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Driver Behaviour Performance Indicators across Europe. Results from the Baseline and Trendline Project in Portugal, Poland, Czechia, and Sweden
Within the European Commission
Ano: 2024
Autor(es): Vieira, S.; Jankowska-Karpa, D.; Valentová, V.; Vadeby, A.
Editor: TRA2024
Keywords: Baseline project; KPI; Driver behaviour; Distraction
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Evaluation of pedestrian crossing accidents using Artificial Neural Network
Most of European cities face increasing problems caused by excessive traffic of conventional fuel-based transport modes. To reverse this situation, sustainable urban mobility policies have been promoting soft modes of transport, such as walking. Despite the advantages of walking in reducing traffic congestion and pollution, cities have not always evolved to accommodate the needs of pedestri-ans. According to the European Commission, in 2020, 20% of road fatalities in the European Union (EU) and 21% in Portugal were pedestrian. Pedestrian fatal-ity rates per million population was 9.7 for all EU countries and 13.1 for Portugal. In European and Portuguese urban areas, 36% and 27% of the fatalities were pedestrians
Ano: 2024
Autor(es): Santos, B.; Gonçalves, J.; Amin, S.; Vieira, S.; Lopes, C.
Editor: TRA2024
Keywords: Severity Predictive Model; Artificial Neural Network (ANN); Risk Factors; Pedestrian Accidents at Urban Crossings; Road Safety
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Intersections Safety and Speed Compliance
Intersections are considered to be high-risk areas due to noncompliance with traffic rules. Failure to yield right of way and running red lights are major issues, but improper turning manoeuvres, like illegal U-turns and improper signalling, are also contributor factors to accidents. Vulnerable road users are particularly at risk at these locations, as these violations may result in severe injuries and congestion.The EU has set ambitious road safety goals in order to reduce the number of killed and injured in road crashes and has recognized the importance of using key performance indicators (KPIs) for assessing road safety performance as a support of road safety policies implementation. In this line of view, the EU promoted several initiatives, where the Baseline and the Trendline projects stand out.The Trendline project introduces several innovative KPIs, including redlight violations at intersections. The gathering of these KPI, using consistent criteria, is a novel effort across multiple European countries.Portugal's prevalent speeding is-sue emphasizes the significance of this endeavour, especially for the country. This paper focuses on the preliminary analysis of intersection compliance, analysing factors like traffic signals, yielding right of way, pedestrian safety, and infrastructure design, whose analysis is crucial for improving road safety.
Ano: 2024
Autor(es): Vieira, S.
Editor: TRA2024
Keywords: Trendline project; KPI; Road safety; Intersections
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Portuguese design standards for urban roads
This abstract aims to provide an overview of the new Portuguese design standards for urban roads, with a particular focus on the pedestrian infrastructure. Walking, as one of the most fundamental traffic modes, emphasizes the importance of thoughtful and inclusive urban road design that effectively meets the mobility needs of all citizens.The development of the pedestrian infrastructure must consider the heterogeneous characteristics of pedestrians and their varying levels of vulnerability, thereby adopting a universal and inclusive urban design. In line with the objectives set out by PENSE 2020 and following the principles of the Safe System, these standards are devised to enhance road safety, particularly for vulnerable users, and to integrate knowledge of road safety in urban settings within the Portuguese context of urban design.Pedestrian pathways are defined within the territorial public domain and cater to individuals traveling by foot, in wheelchairs, or with personal mobility aids. The document focuses on the formal network of pedestrian pathways, including sidewalks, paved pedestrian routes, and crossings, while also acknowledging the spontaneous nature of pedestrian movement along unpaved routes.Design considerations are comprehensive, addressing the dimensions needed to support various pedestrian activities and the interface with urban elements that affect street furniture placement and pedestrian circulation. The typology of sidewalks chosen is also dependent on the road hierarchy, with distinct recommendations according to the varying levels of interactions between pedestrians and vehicular traffic.The new standards further advocate for pedestrian safety through various traffic calming measures, such as segregated zones and shared spaces, with speed regulation forming a core component of the design approach.
Ano: 2024
Autor(es): Vieira, S.
Editor: Walk21
Keywords: Portugal; Urban Roads; Design Standards; Road safety
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Road user behaviour on pedestrian crossings and intersections: How to transform it into the compliance KPIs?
Road safety key performance indicators (KPIs) provide essential insights into factors associated with crash and injury risks. The Trendline project, involving 25 EU Member States, focuses on collecting and analyzing road safety KPIs to inform policy decisions. In addition to standard KPIs recommended by the European Commission, the project explores ten experimental KPIs, including road users
Ano: 2024
Autor(es): Ambros, J.;
Editor: ICTCT
Keywords: Road User Behavior Observation; Key Performance Indicators (KPIs); Traffic Rule Compliance; Road Safety
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Secondary roads in Europe
Following the publication of Directives 2008/96/EC and 2019/1936/EC, Europe-an Union (EU) Member States (MS) developed a comprehensive set of road infrastructure safety management (RISM) procedures that are applied to all roads which are part of the Trans-European Road Network (TEN T), all motorways and primary roads, and to EU funded interurban roads with full access control. These roads carry the bulk of traffic volumes in the EU.This paper clarifies the notion of
Ano: 2024
Número Páginas:
6p..
Autor(es): Cardoso, J. L.; Schermers, G.; Valentová, V.
Revista: Springer book series: Lecture Notes in Mobility
Editor: Springer
Keywords: Road Design; Secondary roads; Road Safety Management
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History and future of EU HDV weights and dimensions policy: insights in policy preparation
The Weights and Dimensions Directive (96/53/EC), which governs the weights and dimensions of heavy commercial vehicles in the European Union, has been in place for 25 years. It is currently being reviewed by the European Commission with the aim of updating it to reflect the current needs of the freight transport market. This paper will describe the steps in the review and update process.The starting point is an evaluation of what the current Directive has achieved since its entry into force some 25 years ago, in light of the objectives set at its inception and how these have changed and impacted amendments to the Directive over its lifetime.Based on the results of the evaluation, the new policy priorities and related legislation, a set of new policy measures are developed and assessed on its economic, social and environmental impacts. This includes measures to decarbonize the sector, achieve further harmonization of rules among Member States, and strengthen the enforcement of rules.
Ano: 2023
Autor(es): Breemersch, T.; Knight, I.; Rodrigues, M.; Daniëls, S.; Maerivoet, S.; Kourounioti, I.; Kiel, J.; Houkes, R.; Jacob, B.; Houtte, B.; Vieira Gomes, S.; Fontul, S.
Editor: Technology Convergence 2023
Keywords: European Union; Impact Assessment; Policy; Legislation; Zero Emission Vehicles; Weight and Dimensions; Heavy Duty Vehicles
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Overweight vehicles: impact on road infrastructure and safety
This paper presents the available information on overweight road freight vehicles around the world, the impacts they have on road infrastructure, road safety and the economic position of road infrastructure managers, and collected global best practices to prevent and mitigate overloading.Overloading can occur on the basis of Gross Vehicle Weight or on axle weight. Existing limits vary greatly between countries, as do compliance rates, which typically are much higher in Europe and North America than in other regions. Overloading greatly affects infrastructure (road pavements and bridges), though certain designs are more sensitive to overloading than others. In addition, aspects like traffic volume, vehicle design, but also climate and weather can exacerbate certain impacts.Poor infrastructure quality as a result of overloading impacts road safety, but overloaded vehicles are also subject to a deterioration of vehicle performance (braking, steering, handling, structural failure,
Ano: 2023
Autor(es): Breemersch, T.; Knight, I.; Fontul, S.; Vieira Gomes, S.; Jacob, B.
Editor: Technology Convergence 2023
Keywords: Overweight vehicles; Best Practice; Safety; Infrastructure; Overloading
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Documento normativo para aplicação a arruamentos urbanos
O presente trabalho insere-se no âmbito de um protocolo entre o IMT - Instituto da Mobilidade e dos Transportes, I.P. (IMT) e o Laboratório Nacional de Engenharia Civil (LNEC) e destina-se a dar resposta à medida 25.92 do objetivo estratégico Infraestruturas Mais Seguras da Estratégia Nacional de Segurança Rodoviária
Ano: 2022
Autor(es): Vieira Gomes, S.
Editor: Ordem dos Engenheiros
Keywords: Arruamentos urbanos; Ambiente rodoviário; Norma de traçado
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Livros
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The effect of low cost engineering measures and enforcement on driver behaviour and safety on single carriageway interurban trunk roads. In Advances in Human Aspects of Road and Rail Transportation.
The application of low-cost road and traffic engineering measures (LCEM) is a cost-effective method for reducing accidents and their consequences. Empirical evidence shows that enforcement contributes to improvements on driving behaviour and road safety; however, results from reducing enforcement are seldom presented.In this paper a presentation is made of the impact LCEM and changes in enforcement intensity had on selected driving behaviour variables and safety levels on a 170 km single carriageway trunk road. LCEM were implemented on the road, followed a year later by the commitment of exceptionally intense and severe law enforcement and, after two years, its relaxation. The impacts of these safety interventions were evaluated through observational before-after studies. The expected number of injury accidents was reduced by 41% (less 75% fatalities), when considering the combined effect of LCEM and enforcement; suppression of strict enforcement was related to a 20% increase in the number of fatalities.
Ano: 2012
Número Páginas:
10.
Autor(es): Cardoso, J. L.
Editor: CRC Press Taylor & Francis Group
Keywords: Driving behaviour; Low cost measures; Safety effects
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Application of a gap-graded asphalt rubber wearing course in the rehabilitation of the pavement of a stretch of the national road EN1 located in the north of Portugal - Field and laboratory case study
This case study refers to a successful application of an asphalt rubber wearing course in the frame ofthe rehabilitation of the pavement of the National Road EN 1 between Landiosa and Picoto.It concerns asphalt rubber manufactured by the wet process, using gap-graded aggregates. / O presente caso de estudo refere-se à aplicação bem sucedida de misturas com betume modificadocom borracha reciclada de pneus em camada de desgaste, no âmbito das obras de reabilitação dopavimento da estrada nacional EN 1, entre Landiosa e Picoto.Diz respeito, em particular, ao fabrico, por via húmida, de mistura betuminosa com borrachautilizando agregados com granulometria descontínua.
Ano: 2010
Número Páginas:
20pp.
Autor(es): Batista, F. A.; Antunes, M. L.
Editor: LNEC
Volume:
NS 124
Keywords: Laboratory test; In situ test; National road; Rubber; Recycled materials; Road pavement rehabilitation; Asphaltic road pavement; Asphalt; Pt
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Modos Suaves, Manual de Boas Práticas para uma Mobilidade Sustentável
Manual de boas práticas para uma mobilidade sustentável, no âmbito do projecto nacional "Mobilidade Sustentável" coordenado pela Agência portuguesa do Ambiente (Vol. II). O projecto Mobilidade Sustentável envolveu uma rede de 15 centros de investigação/universidades do país, incluindo o LNEC.
Ano: 2010
Número Páginas:
274p..
Autor(es): Arsénio, E.; Viegas, F.
Editor: Agência Portuguesa do Ambiente (APA)
Volume:
Vol. II.
Keywords: Boas práticas; Portugal; Municípios; Planos de mobilidade; Mobilidade sustentável
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Projecto Mobilidade Sustentável. Concepção, Principais Conclusões e Recomendações
Nesta publicação apresentam-se os aspectos relativos à concepção do projecto Mobilidade Sustentável, principais conclusões e recomendações.
Ano: 2010
Número Páginas:
80p..
Autor(es): Arsénio, E.; Viegas, F.
Editor: Agência Portuguesa do Ambiente (APA)
Volume:
Volume I.
Keywords: Planeamento de transportes; Mobilidade sustentável
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Capítulos de Livros
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Intelligent Traffic Monitoring Systems
Traffic management is gaining increasing importance in solving the major problem of traffic congestion present in many countries. Traditional techniques of RADAR, LIDAR and LASAR to address this problem are no longer an efficient solution, as they are time-consuming and expensive. In this modern age of growing technology and population, challenges are being overcome with several new ways to make the traffic system smarter, more reliable and robust, considering the overall interaction of all the traffic components: vehicles, drivers and pedestrians. These systems are largely supported on Intelligent Traffic System (ITS), and their applications are mostly dedicated to traffic monitoring based on video processing, vehicle detection and tracking. Intelligent surveillance systems may also employ computer vision and pattern recognition techniques. This chapter addresses these new solutions that are being used for traffic management, their advantages and disadvantages, the challenges of their implementation, and most important, the ability to support traffic management systems in their pursuit of solving critical problems of congested transportation networks.
Ano: 2022
Autor(es): Vieira Gomes, S.
Revista: Advances on testing and experimentation in civil engineering
Editor: Springer
Keywords: Vehicle detection and tracking; Traffic management; Intelligent traffic systems
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Modelos de Duração Aplicados à Engenharia de Transportes
O tempo decorrido (ou a distância percorrida) até à ocorrência de um evento, ou a duração do mesmo, podem ser analisados através de modelos de duração baseados em risco (hazard-based duration models), os quais têm sido amplamente utilizados em campos como a medicina, as ciências sociais e a engenharia industrial. Contudo, são relativamente escassos os estudos que aplicaram modelos de duração à engenharia de transportes.Este capítulo inclui dois exemplos de aplicação de modelos de duração à investigação em engenharia de transportes. O primeiro diz respeito às distâncias percorridas por veículos descontrolados em despistes ocorridos na Carolina do Norte (E.U.A.). O segundo refere-se ao tempo decorrido até à transferência modal nas deslocações para a escola de um conjunto de alunos de 162 turmas de 51 escolas do ensino básico em Portugal.
Ano: 2021
Número Páginas:
109-124.
Autor(es): Roque, C. A.
Revista: Modelação Matemática em Engenharia de Transportes. A Experiência do Departamento de Transportes do LNEC
Keywords: Modelo de duração; Engenharia de transportes
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Modelos de estimativa de frequência de acidentes rodoviários
Em Portugal, a investigação sobre o conhecimento dos fatores que afetam a probabilidade de ocorrência de acidentes tem-se centrado essencialmente nas estradas interurbanas. No entanto, as zonas urbanas, onde ocorrem elevadas percentagens de acidentes corporais requerem uma atenção prioritária. Com o presente estudo pretendeu contribuir-se para a melhoria da segurança rodoviária em meio urbano, através da criação de ferramentas que podem ser utilizadas em métodos de intervenção em que a segurança dos utentes vulneráveis seja considerada explicitamente nas fases de planeamento e gestão das redes viárias. Uma das referidas ferramentas resultou da elaboração de modelos de estimativa de frequência de acidentes para redes urbanas, segundo diversas desagregações, em função de características do elemento rodoviário: em intersecções (três ramos, quatro ramos e rotundas) e em segmentos; segundo o tipo de acidente (atropelamentos e restantes acidentes com vítimas); e segundo a inclusão de variáveis explicativas relacionadas com o ambiente rodoviário: simplificados (apenas com as variáveis de exposição) e globais (com todas as potenciais variáveis explicativas). O desenvolvimento destes modelos foi apoiado numa base de dados georreferenciada dos acidentes rodoviários ocorridos em Lisboa entre 2004 e 2007, com a qual foi possível explorar os dados de sinistralidade na área geográfica em análise. Estas ferramentas podem ser usadas diretamente na gestão das infraestruturas rodoviárias da cidade de Lisboa e, após pequenas adaptações, estendidas a outros municípios, dotando as respetivas entidades competentes em matéria de segurança rodoviária com informação rigorosa e detalhada sobre os fatores intervenientes na ocorrência de acidentes em meio urbano e a respetiva distribuição espacial.
Ano: 2021
Número Páginas:
71-96pp.
Autor(es): Vieira Gomes, S.; Cardoso, J. L.
Revista: Modelação Matemática em Engenharia de Transportes
Editor: LNEC
Keywords: Método empírico de Bayes; Acidentes rodoviários; Modelação linear generalizada; Zonas de acumulação de acidentes; Modelos de estimativa de frequência de acidentes
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Modelos Explicativos da Gravidade dos Acidentes Rodoviários
Os dados discretos ou em escala nominal desempenham um papel fundamental nos transportes porque muitas análises de políticas lidam com estes tipos de dados. Exemplos de dados discretos nos transportes incluem o modo de transporte (automóvel, autocarro, comboio), o tipo ou categoria de veículo e o tipo de acidente rodoviário (despistes, colisões frontais, colisões traseiras, etc.). O conhecimento do efeito das diferentes intervenções de segurança rodoviária na redução da gravidade das lesões resultantes de acidentes rodoviários exige uma avaliação empírica detalhada das interações, reconhecidamente complexas, entre veículos, estrada e fatores humanos.Os avanços mais recentes nas metodologias estatísticas aplicadas a dados discretos sobre sinistralidade rodoviária permitiram o desenvolvimento de modelos sofisticados capazes de serem usados para determinar com rigor a influência dos fatores acima referidos nos níveis de gravidade das lesões resultantes dos acidentes rodoviários.Neste contexto, a aplicação de modelos de resultado discreto permite identificar um conjunto de fatores, relacionados com a envolvente rodoviária, que são estatisticamente relacionáveis com a gravidade das lesões dos utentes envolvidos em acidentes rodoviários, permitindo aperfeiçoar a conceção e o dimensionamento das estradas, bem como orientar políticas conducentes à melhoria da segurança rodoviária. Este capítulo inclui um exemplo de aplicação do modelo logit multinomial usando a gravidade das lesões no condutor como variável de resposta.
Ano: 2021
Número Páginas:
97-108.
Autor(es): Roque, C. A.; Cardoso, J. L.
Revista: Modelação Matemática em Engenharia de Transportes. A Experiência do Departamento de Transportes do LNEC.
Keywords: Acidente rodoviário; Modelo de resultado discreto; Modelo logit multinomial
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A hybrid approach for prioritising road safety interventions in urban areas
Spatial organization in cities has often given a special attention to the requirements of motorized vehicles, neglecting pedestrians and cyclists
Ano: 2020
Número Páginas:
204-208pp.
Autor(es): Vieira Gomes, S.; Roque, C. A.; Cardoso, J. L.
Revista: Proceedings of the XXIV International Conference on Living and Walking in Cities.
Editor: CRC Press, Taylor & Francis Group
Keywords: High crash risk sites; Empirical Bayes method; GIS; Accident prediction models
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The role of sustainable urban mobility plans and ICT to improve public space for social inclusion
The importance of sustainable urban mobility plans is widely recognized by local and regional authorities across Europe. Technological innovation opportunities such as those offered by current and future ICT can contribute for cities to advance towards sustainable mobility and accessibility for inclusive public spaces.This article is built on an innovative living lab experience of the Intermunicipal Community of the Algarve (AMAL), the regional transport authority, scientifically supported by the LNEC, in Portugal, that comprised the development of the designated
Ano: 2018
Número Páginas:
109-122pp.
Autor(es): Arsénio, E.; Coelho, J.
Revista: Neighbourhood & City - Between digital and analogue perspectives
Editor: UL/COST
Keywords: Transport decarbonisation; Low carbon mobility; Accessibility; Transport planning and policies; Public spaces; App; Information and communications technology; Sustainable mobility
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Teses de Doutoramento
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Avaliação da Influência da Infra
O conhecimento dos factores que afectam a probabilidade de ocorrência de um acidente éuma área de investigação relevante de há muitas décadas devido aos enormes custos para asociedade dos acidentes rodoviários. Em Portugal, os desenvolvimentos nesta matériacentraram-se essencialmente nas estradas inter-urbanas. No entanto, as zonas urbanas,caracterizadas por elevadas percentagens de acidentes corporais (cerca de 69% do total entre2004 e 2008), requerem uma atenção prioritária.Com o presente estudo pretendeu contribuir-se para a melhoria da segurança rodoviária emmeio urbano, através da criação de ferramentas que podem ser utilizadas em métodos deintervenção em que a segurança dos utentes vulneráveis seja considerada explicitamente nasfases de planeamento e gestão das redes viárias.A primeira ferramenta correspondeu à criação de uma base de dados georreferenciada dosacidentes rodoviários ocorridos na cidade de Lisboa entre 2004 e 2007, que permitiu adefinição de mapas digitais, com possibilidade de uma grande diversidade de consultas e decruzamentos de informação.A segunda ferramenta refere-se à elaboração de modelos de estimativa de frequência deacidentes para redes urbanas, segundo diversas desagregações: segundo o elementorodoviário: em intersecções (intersecção de três ramos, intersecção de quatro ramos erotundas) e em segmentos; segundo o tipo de acidente: atropelamentos e restantes acidentescom vítimas; e segundo a inclusão de variáveis explicativas relacionadas com o ambienterodoviário: simplificado (apenas com as variáveis de exposição) e global (com todas aspotenciais variáveis explicativas). Foi considerada a incorporação de dados de exposiçãorelativos aos utentes vulneráveis por forma a melhorar a capacidade de estimativa dasinistralidade em redes urbanas.Estas duas ferramentas podem ser usadas directamente na gestão de infra-estruturas, dotandoas entidades com competência em matéria de segurança rodoviária com informação rigorosa edetalhada sobre os factores intervenientes na ocorrência de acidentes em meio urbano erespectiva distribuição espacial.
Ano: 2010
Número Páginas:
371.
Autor(es): Vieira Gomes, S.
Keywords: Sistemas de informação geográficos; Modelos matemáticos; Zona urbana; Segurança rodoviária
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Estudo das Relações entre as Características da Estrada, a Velocidade e os Acidentes Rodoviários. Aplicação a Estradas de Duas Vias e Dois Sentidos.
No período de 1988 a 1993, ocorreram anualmente nas estradas rurais de uma faixa de rodagem e dois sentidos da Rede Rodoviária Nacional de Portugal, em média, cerca de 1471 acidentes corporais anuais em curva fora de cruzamentos. Estes acidentes constituem cerca de 33% dos acidentes corporais fora de cruzamentos participados na referida rede.O objectivo do presente trabalho é contribuir para o conhecimento da influência da estrada na ocorrência de acidentes e para o desenvolvimento de um método para avaliação de traçados rodoviários do ponto de vista da segurança.Foram realizadas in situ campanhas de recolha de dados sobre as distribuições de velocidades dos condutores, os quais foram relacionados com as características geométricas das estradas e com a respectiva sinistralidade. Foram desenvolvidos modelos para estimativa de perfis de velocidade de circulação livre, bem como modelos para estimativa da frequência de acidentes, em estradas de uma faixa de rodagem e dois sentidos, adaptados às condições de tráfego nacionais. Os referidos modelos foram integrados num procedimento para detectar inconsistências de velocidade em especial associadas à ocorrência de acidentes em curva, o qual foi usado para fundamentar uma proposta de quantificação de critérios de homogeneidade de traçado, adaptados à realidade do sistema de tráfego rodoviário português.
Ano: 1996
Autor(es): Cardoso, J. L.
Keywords: estrada de 2 vias e 2 sentidos; Modelos de frequência de acidentes; Homogeneidade de traçado; Velocidade; Acidente rodoviário; Características da estrada
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Relatórios
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Safety Performance Indicators: posters for the first SafetyNet Conference
Work Package 3 of SafetyNet deals with Safety Performance Indicators. They measure the operational conditions of the road traffic system. Work Package 3 deals with seven topics: alcohol and drug use; speeds; protective systems; daytime running lights; vehicles; road; trauma management. This deliverable concerns the contribution of Work Package 3 to the first SafetyNet conference, which was held in Prague on May 10 and 11, 2006. Each topic prepared a poster with an overview of the state-of-play. In this document, these posters are assembled. Each topic has a preferred indicator, which can be used for measuring safety performance across countries. This indicator is accompanied by requirements that should be met by the data, in order to be able to calculate the indicator. For most tasks, values could be calculated for the indicators by using the available data. Data are not available for all countries and/or all topics.
Ano: 2006
Autor(es): Hafen, K.; Hasse, A.; Allenbach, R.; Riguelle, F.; Verbeke, T.; Eksler, V.; Haddak, M.; Holló, P.; Arsénio, E.; Cardoso, J. L.; Vieira Gomes, S.; Papadimitriou, E.; Goldenbeld, C.; Mathijssen, R.; Lou
Keywords: SafetyNet conference; road traffic system; Safety performance indicator
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A comparative study of the development of road safety in Catalonia, Spain, Portugal and Greece.
This report is one of three area reports that examine the road safety performance of the nine countries participating in the SUNflowerplus project. This area report compares the road safety situation of the Southern countries of Greece, Portugal and Spain (including a separate analysis for the Spanish autonomous region of Catalonia).The aim of this report is to identify the major road traffic risk differences between Southern European countries based upon a comparative approach initially applied by the SUN (Sweden, United Kingdom & the Netherlands) countries, and focussed on the analysis of fatalities by users of different modes of road transport.The method for comparing the Southern countries has been developed from that of the original SUNflower report (SWOV, 2002), and is reflected in the organisation of the chapters:- Description of national policy and plans. - Description of the transport context.- Fatalities by road user mode and collisions between modes.- Case studies for: drink-driving, seat belts, young drivers, speed management, pedestrians, mopeds and motorcycles.In some cases (for example, young drivers and pedestrians), the indicators used to compare the situation in the Southern countries are common to those reported in the SUN and Central areas. In other cases (for example, speed management) the situations are very different and there is less scope for comparison.SUNflower+6 compares statistics for road fatalities in terms of fatalities within 30 days of the accident. In all three Southern countries, the figures are based on national factors applied to police data recording deaths within 24 hours. In producing indicators, various efforts to improve data systems have been detected. In general, a greater use of information and communications technologies could improve the process of data registration as well as facilitating improved analysis.All three countries (and the autonomous region of Catalonia) have published a plan covering a period of three or more years (including the current year of 2005) that sets quantified targets for a reduction in the number of road accident fatalities. Such progress in road safety planning is a relatively new aspect of road safety activity in the Southern countries studied. The targeted reductions for Portugal are even more ambitious than those of the EU White Policy paper proposing a halving in road deaths by 2010, whilst those for Spain and Catalonia are in line with the European overall projection and those for Greece are more modest.
Ano: 2005
Autor(es): Hayes, S.; Serrano, S.; Giralt, L. P.; Zori, P.; Handanos, Y.; Lymperi, C.; Katsochis, D.; Macedo, A. L.; Cardoso, J. L.; Vieira Gomes, S.
Keywords: injury; traffic; policy; Road safety
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State of the art Report on Road Safety Performance Indicators.
GeneralRoad safety can be assessed in terms of the social costs of crashes and injuries. However, simply counting crashes or injuries is an imperfect indicator of the level of road safety. When crashes occur it is the
Ano: 2005
Autor(es): Hafen, K.; Lerner, M.; Allenbach, R.; Verbeke, T.; Eksler, V.; Haddak, M.; Holló, P.; Arsénio, E.; Cardoso, J. L.; Vieira Gomes, S.; Papadimitriou, E.; Amelink, M.; Goldenbeld, C.; Mathijssen, R.; Lou
Keywords: Safety performance Indicators; Road safety
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SUNFLOWER+6. Southern Group. Case Study on Pedestrians
The SUNflower+6 project is based on a comparative study regarding road safety in nine countries and one autonomous region from the EU. These countries are divided into three groups: -
Ano: 2005
Autor(es): Macedo, A. L.; Vieira Gomes, S.; Cardoso, J. L.; Handanos, Y.; Katsochis, D.; Serrano, S.; Zori, P.; Hayes, S.
Keywords: Pedestrians; Road user; Fatality; Injury; Policy; Road safety
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Informações Científicas e Técnicas
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Audit de sécurité routière au projet de routes du réseau routier national
Ce document est la traduction en langue française du manuel destiné à appuyer la mise en oeuvre d'audits de sécurité routière au projet d
Ano: 2018
Autor(es): Cardoso, J. L.
Keywords: PT; La sécurité routière; Manuel; Audit; Projet routier
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Estado-da-arte sobre medidas de engenharia de segurança rodoviária em ambiente urbano e sobre modelos de estimativa da frequência de acidentes - Resultados do projecto IRUMS
O presente documento constitui o primeiro relatório referente à actividadedesenvolvida pelo Laboratório Nacional de Engenharia Civil (LNEC) e pela Faculdadede Ciências e Tecnologias da Universidade de Coimbra (FCT/UC) no âmbito doprojecto IRUMS
Ano: 2011
Número Páginas:
152pp.
Autor(es): Vieira Gomes, S.; Cardoso, J. L.; Carvalheira, C.; Picado Santos, L.
Editor: LNEC
Keywords: Previsão estatística; Modelo estatístico; Acidente rodoviário; Área urbana; Segurança rodoviária
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Método para intervenção na infra-estrutura rodoviária urbana para melhoria da segurança - Resultados do projecto IRUMS
O presente documento constitui o quinto relatório referente à actividade desenvolvidapelo Laboratório Nacional de Engenharia Civil (LNEC) e pela Faculdade de Ciências eTecnologias da Universidade de Coimbra (FCT/UC) no âmbito do projecto IRUMS
Ano: 2011
Número Páginas:
51pp.
Autor(es): Vieira Gomes, S.; Cardoso, J. L.; Carvalheira, C.; Picado Santos, L.
Editor: LNEC
Keywords: Análise de dados; Modelo estatístico; Acidente rodoviário; Segurança rodoviária; Área urbana; Infra-estrutura rodoviária
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Accident prediction models for bidirectional data on portuguese motorways
The present document describes prediction models for accident, fatalities,serious injuries and killed and seriously injured victims, adjusted to bidirectionaldata of Portuguese motorway sections. The study was developed at LaboratórioNacional de Engenharia Civil (LNEC) in the scope of Workpackage 2 - SafetyImpact Assessment and Accident Prediction Model of the RIPCORD-ISERESTproject, carried out under the 6th European Framework Program. It covers theissues related to modeling accidents using the Negative Binomial modelregressions as well as detailed diagnostic checks of the models obtained.The data used were collected over a five year period, ranging from 1999 to2003. Several explanatory variables were measured concerning exposure,number of lanes, presence of an additional lane, lane widths, type and widths ofthe road
Ano: 2009
Número Páginas:
153pp.
Autor(es): Lopes, S.; Cardoso, J. L.
Editor: LNEC
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Outros
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Study for a possible Revision of the European legal framework for maximum authorised weights and dimensions of certain road vehicles
This document forms the Final Report of the Support study for the ex-post Evaluation of Directive 96/53/EC on Weights and Dimensions (W&D). The W&D Directive regulates the maximum weights and dimensions of vehicles for road transportation of goods and people in the EU. The Directive has been amended several times to promote more energy-efficient and sustainable transport. National derogations are allowed under the Directive, and some member states have taken advantage of this to permit larger capacity vehicles.This study, which ran from May 2022 until April 2023, was awarded by the Directorate-General for Mobility and Transport (DG MOVE) of the European Commission to a Consortium led by Ramboll Management Consulting along with Transport & Mobility Leuven, Panteia, LNEC, Apollo Vehicle Safety, and individual subcontracted experts. Methodologically, the study followed the process of a backward-looking Evaluation as set out in the Better Regulation Guidelines. This means that it covers five primary evaluation criteria (relevance, effectiveness, efficiency, coherence, and EU added value. Following a round of qualitative desk research and literature review, stakeholder consultation activities were conducted to gather primary data in relation to each of the evaluation questions. This included a large stakeholder survey, a limited number of targeted follow-up interviews, a workshop, and the analysis of a Public Consultation run by the Commission.One key tool guiding the evaluation process has been formed by the Intervention Logic (figure on the next page). The graphical representation of the tool brings together in a comprehensive way what the main problems (and underlying drivers) are related to the Directive, as well as the general, specific, and operational objectives contained in these. Finally, it shows the inputs used as well as the outputs produced and the results and impacts ultimately brought about by it. The links between specific elements are shown with arrows.This has been used in conjunction with an Evaluation Matrix setting out 17 main Evaluation Questions (EQs), as well as more operational sub-questions, indicators, judgment criteria, data sources, and analytical approach used.
Ano: 2024
Autor(es): Breemersch, T.; Knight, I.; Rodrigues, M.; Daniëls, S.; Maerivoet, S.; Kourounioti, I.; Kiel, J.; Vieira Gomes, S.; Fontul, S.; Houkes, R.; Jacob, B.; Houtte, B.
Keywords: Stakeholder consultation; Directive 96/53/EC; Evaluation
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Support study for the ex-post evaluation of Directive 96/53/EC on Weights and Dimensions
This Impact Assessment accompanied a legislative proposal for the revision of Council Directive 96/53/EC on the maximum dimensions and weights of certain road vehicles in national and international traffic (the Weights and Dimensions Directive). The revision aimed to support the EU
Ano: 2023
Autor(es): Breemersch, T.; Knight, I.; Rodrigues, M.; Daniëls, S.; Maerivoet, S.; Kourounioti, I.; Vieira, S.; Fontul, S.; Houtte, B.; Kiel, J.; Houkes, R.
Keywords: Impact Assessment; European Union; Zero Emission Vehicles; Legislation, Policy; Heavy Duty Vehicles; Weight and Dimensions
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Benchmarking road safety in Latin American countries
The main objective of the project was the benchmarking of road safety performances and developments of ten Latin American countries.The comparison allowed to identify the similarities and differences between countries, not only on the number of crashes and casualties, but also on the factors, circumstances and events that influence the risk of a crash and the severity of its outcome. The analysis was performed in the following areas
Ano: 2018
Autor(es): Vieira Gomes, S.; Feypell, V.; Wegman, F.
Keywords: Data collection; Latin America; Benchmarking; Road safety
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Document organisationnel du système de comptage. Document descriptif des besoins
Neste relatório é proposta a estrutura organizacional para realização das contagens tendentes ao recenseamento de tráfego rodoviário na rede de estradas interubanas da Argélia, incluindo o dimensionamento do parque de equipamento de contagem a usar, sua configuração (cntagens permanentes e temporárias), bem como a avaliação dos prazos de realização, em função da dimensão das equipas encarregadas da colocação e exploração dos equipamentos nos trechos da rede rodoviária.
Ano: 2017
Autor(es): Rème, A.; Courbon, T.; Robin, V.; Cardoso, J. L.
Keywords: Rede rodoviária; Tráfego rodoviário
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Transport Challenge in Horizon 2020. ECTRI suggestions for the third work programme (2018-2020) in the field of "Transport economics and policy"
The European Conference of Transport Research Institutes (ECTRI) is an international non
Ano: 2016
Autor(es): Arsénio, E.; Heddebaut, O.; Tuominen, A.
Keywords: Connected and automated transport; Socio-economic research; Low carbon transport; Behavioural research; Transport policies; Transport economics; Integrated transport; Green transport; Smart transport; Horizon 2020
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Assessment of intermodal freight transport costs
The research reported in this paper is part of the R&D project COST-TRENDs, funded by the Portuguese Foundation for Science and Technology. It presents a strategic assessment study of the hinterland connections centred in the Port of Sines, in Portugal, that integrates the core network corridor of the Trans-European Transport Network (TEN-T) designated as the Atlantic corridor. The study comprised the analysis of trends of maritime freight costs until 2020 and the assessment of alternative intermodal freight transport options to reduce costs along the multimodal transport chains. The options evaluated focused in the Iberian section of the Atlantic corridor and included the combination of maritime-short sea shipping, maritime-rail, maritime-road and, also, rail-air modes. The study estimated several key performance indicators for each option which aim to provide useful inputs to transport policy.
Ano: 2014
Número Páginas:
16pp.
Autor(es): Prata, J.; Arsénio, E.
Keywords: Freight transport costs; Co2 emissions; Climate change externalities; Intermodal freight transport
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How to Promote Sustainable Land-Use Changes Through Developing Intermodal High-Speed Railway Stations: a case study in Portugal
The literature shows that the development of the railway system in most European countries had a key role both in the evolution of urban systems and regional dynamics. On the other hand, it can be said that railway stations might act as important drivers for promoting sustainable land-use changes, namely of node and place functions which can be consistently balanced.The future Portuguese High-Speed Railway (HSR) network is considered as a major strategic transport scheme at both the Iberian and national levels. Its first stage comprises three routes. Of these, one links the Lisbon Metropolitan Area with the Spanish border of Badajoz, being an integral part of the HSR between both Iberian capitals, whereas the other two form the Atlantic Axis, encompassing a system of cities ranging from Lisbon to Porto, an from the latter point to Braga, Vigo and Coruña, concentrating nearly 80% of the whole Portuguese population, and serving an area generating about 90% of Portugal
Ano: 2010
Número Páginas:
30p..
Autor(es): Arsénio, E.; Tao, M.; Ferreira, F.
Editor: PTRC, UK
Keywords: Stated-choice survey; Discrete choice models; Territorial impacts; Intermodality; High-speed rail
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