Papers
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Defining suitable Safe System projects: The experience of the SaferAfrica project in five African countries
When dealing with road safety in Africa, one should bear in mind that road safety problems need to be seen in their context as the solutions proposed to address them. While it is relevant to consider international good practices, African stakeholders should become owners of the interventions addressing their problems and take the responsibility for developing and implementing the appropriate solutions, taking advantage of suitable technical assistance, if needed. Based on these considerations, in this paper, a presentation is made of the process used in the European research project SaferAfrica to define suitable Safe System projects in Africa. This project aims at supporting policymakers and stakeholders with evidence on critical risk factors, related actions, and good practices drawn from high-quality data and knowledge. In the project, road safety and traffic management capacity reviews at the country level were carried out in five countries (Cameroon, Burkina Faso, Tunisia, Kenya, and South Africa), following the World Bank guidelines. After conducting such a capacity review, these guidelines recommend the preparation and implementation of Safe System projects,
Year: 2021
Number Pages:
14.
Author(s): Schermers, G.; Cardoso, J. L.; Usami , D.; Persia, L.; Gonzalez-Hernandez, B.; Kunsoan, N.; Meta, E.; Saporito, M.; Carnis, L.; Yerpez, J.; Bouhamed, N.; Kluppels, L.; Vandemeulebroek, F.
: IATSS Research
Editor: Elsevier Ltd.
Volume:
316.
Keywords: Políticas de transportes; Gestão de segurança; Visão zero; Sistema seguro; Segurança rodoviária
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Investigation of injury severities in single-vehicle crashes in North Carolina using mixed logit models
Introduction: Roadway departure (RwD) crashes, comprising run-off-road (ROR) and cross- median/centerline head-on collisions, are one of the most lethal crash types. According to the FHWA, between 2015 and 2017, an average of 52 percent of motor vehicle traffic fatalities occurred each year due to roadway departure crashes. An avoidance maneuver, inattention or fatigue, or traveling too fast with respect to weather or geometric road conditions are among the most common reasons a driver leaves the travel lane. Roadway and roadside geometric design features such as clear zones play a significant role in whether human error results in a crash.in a crash.Method: In this we used mixed-logit models to investigate the contributing factors on injury severity of single-vehicle ROR crashes. To that end, we obtained five years
Year: 2021
Number Pages:
161-169.
Author(s): Roque, C. A.; Jalayer, M.; Hasan, A.S
: Journal of Safety Research
Editor: Elsevier
Volume:
Volume 77.
Keywords: Crash severity model; Mixed logit model; Run-off-road; Roadway departure
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Shifting from Private to Public Transport using Duration-Based Modeling of a School-Based Intervention
School commuting with public transportation (PT) and shifting away from private cars remains a challenge, especially for transport planners. From behavioral and cultural viewpoints, car dependence has not yet been reversed in many cities. Actions to promote the shift to PT should be multidisciplinary and multi-instrumental to increase PT adoption and achieve more sustainable mobility. There is a lack of strategic alignment between the different stakeholders involved in school commuting of children (parents, school, PT operators) and empirical studies sustaining the effectiveness of actions to shift away from the car. Moreover, PT behavioral aspects are still poorly researched from a marketing perspective. This research aims to help fill the gap by implementing actions related to the 4Ps of the marketing mix (product, place, price, promotion). Ten schools in the Lisbon Metropolitan Area were involved in those actions and then surveyed (1,760 survey participants) to evaluate the impact on their behavioral change, that is, to start going to school with PT. The study explores the impact of a set of marketing events on the time duration before children shift to PT when commuting to school, with a hazard-based duration model. Results suggest that to promote school commuting with PT, it is necessary to characterize the school community before commencing any mobility-oriented intervention, particularly concerning sociodemographic attributes and mobility patterns. These are critical information to design marketing actions better and to adapt and improve the quality of PT vehicles and services that operate to and from schools.
Year: 2020
Number Pages:
540
Author(s): Motta Queiroz, M.; Moura, F.; Roque, C. A.
: Transportation Research Record
Editor: SAGE
Volume:
2674(7).
Keywords: Lisbon Metropolitan Area; School commuting; 4Ps of Marketing Mix; Hazard-Based Duration Model
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Asessing multimodal mobility trends using heterogeneous data sources: a case study for supporting sustainable mobility policy goals within the Algarve region
This paper is built around a research project developed with the support of the Regional Planning Authority of the Algarve Region in Portugal which assessed mobility patterns covering all modes of transport using heterogeneous data sources (time-series data). Data mining techniques helped to identify limitations in some data sets. The econometric analysis showed that integrated autoregressive models and moving averages for series with seasonality were successful in the prediction of passenger flows using time-series data gathered by the regional authority from transport operators and other entities. Results from the analysis are useful to support a strategy to reverse current trends on continued car growth (along with public transport decrease) and to devise policy measures to enable a sustainable mobility path towards decarbonisation and social equity goals until 2030.
Year: 2019
Number Pages:
12p.
Author(s): Arsénio, E.; Silva, S.; Pereira, H.; Domingues, A.
Editor: Elsevier
Keywords: Big data; Decarbonisation; Multimodal mobility; Trend analysis; Passenger flow prediction models; Sustainable mobility
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Topic analysis of Road safety inspections using latent dirichlet allocation: A case study of roadside safety in Irish main roads
Under the Safe System framework, Road Authorities have a responsibility to deliver inherently safe roads and streets. Addressing this problem depends on knowledge of the road network safety conditions and the number of funds available for new road safety interventions. It also requires the prioritization of the various interventions that may generate benefits, increasing safety, while ensuring that reasonable steps are taken to remedy the deficiencies detected within a reasonable timeframe. In this context, Road Safety Inspections (RSI) are a proactive tool for identifying safety issues, consisting of a regular, systematic, on-site inspection of existing roads, covering the whole road network, carried out by trained safety expert teams.This paper aims to describe how topic modelling can be effectively used to identify co-occurrence patterns of attributes related to the run-off-road crashes, as well as the corresponding patterns of road safety interventions, as described in the RSI reports. We apply latent Dirichlet allocation (LDA), a widespread method for fitting a topic model, to analyse the topics mentioned in RSI reports, divided into two groups: problems found; and proposed solutions. For this study, 54 RSI gathered over six years (2012 - 2017) were analysed, covering 4011 km of Irish roads.The results indicate that important keywords relating to the
Year: 2019
Number Pages:
336-349.
Author(s): Roque, C. A.; Cardoso, J. L.; Connell, Tomas; Schermers, G.; Weber, R.
: Accident Analysis and Prevention
Editor: Elsevier
Volume:
Volume 131.
Keywords: Roadside safety; Road Safety Inspection; Text mining; Topic Modeling; Latent Dirichlet allocation
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Improving roadside design policies for safety enhancement using hazard-based duration modeling
Roadway departure (RwD) crashes, comprising run-off-road (ROR) and cross-median/centerline head-on collisions, are one of the most lethal crash types. Nationwide, from 2014 to 2016, annual RwD crashes accounted for 53% of all motor vehicle traffic fatalities. Several factors may cause a driver leave the travel lane, including an avoidance maneuver and inattention or fatigue. Roadway and roadside geometric design features (e.g., lane widths and clear zones) play a significant role in whether human error results in a crash. In this paper, we present a hazard-based duration model to investigate the distance traveled by an errant vehicle in a run-off-road crash, the stopping hazard rates, and associated risk factors. For this study, we obtained five years' (2010
Year: 2018
Number Pages:
165-173pp..
Author(s): Roque, C. A.; Jalayer, M.
: Accident Analysis and Prevention
Editor: Elsevier
Volume:
120.
Keywords: Forgiving roadside; Roadside design; Cox model; Run-off-road crash; Hazard-based duration model
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Portuguese mainland road network safety performance indicator
Stepping away from traditional crash-based road safety measurements, several safety performance indicators (SPI) have been proposed in the past few years. SPI can incorporate quantitative and qualitative information on specific aspects that are known to have influence in the safety levels and, not only measure the influence of various safety interventions but also enable comparisons between different road systems. This paper presents the results of the application of a road network SPI to the entire Portuguese road network. This SPI aims at evaluating at the network level, if the connections between urban centres within a region are made by the adequate type of roads regarding generic safety criteria. To this end, the connections to be assessed were classified into pre-defined theoretical safety classes, based on the population of the connected urban centres. Then, the observed safety class of these connections was assessed according to the characteristics of their cross-section and associated road environment of the existing connection between the two urban centres. If the observed class is ensured by a road of higher or equal class than the pre-defined theoretical level in all its extension, the link is considered to be of the appropriate class. For each connection, the results of its evaluation are expressed as a binary value: 0 when the class is not appropriate; and 1 when it is appropriate. The evaluation results are weighted by the road length and aggregated by connection class and throughout the whole road network. The results show a satisfactory network configuration with an SPI of 94% connections with class equal to or higher than the adequate for the type of connection between urban centres they established. The above insights can help in the identification of potential operational inconsistencies that may require safety-related interventions and used for international benchmarks against existing SPI evaluations.
Year: 2018
Number Pages:
416-422pp.
Author(s): Vieira Gomes, S.; Cardoso, J. L.; Lima Azevedo, C.
: Case Studies on Transport Policy
Editor: ELSEVIER
Volume:
Volume 6, Issue 3.
Keywords: Road network; Spatial analysis; Geographic information system; Safety performance indicator
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Assessing intermodal freight transport scenarios bringing the perspective of key stakeholders
This paper extends the previous R&D project on the evaluation of intermodal freight transport scenarios (seamless multimodal logistic chains) centered in the Port of Sines in Portugal where a set of alternative investment options were compared: (i) maritime
Year: 2017
Number Pages:
900-915pp.
Author(s): Prata, J.; Arsénio, E.
: Transportation Research Procedia
Editor: Elsevier
Volume:
25C.
Keywords: Corporate social responsability; CO2 emissons; Shipping speed; Freight transport costs; Intermodal transport
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Assessing the market potential of electric bicycles and ICT for low carbon school travel: a case study in the smart city of Águeda
Electric bikes (e-bikes) may help in transport decarbonisation in European cities. To fully assess the market potential of e-bikes, further research is needed to understand users
Year: 2017
Number Pages:
12p.
Author(s): Arsénio, E.; Dias, J.; Azeredo Lopes, S.; Pereira, H.
: Transportation Research Procedia
Editor: Elsevier
Keywords: Sustainable urban mobility; Low carbon transport; Electric bicycles; Cycling to school
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Sustainable urban mobility plans:bridging climate change and equity targets?
The European Commission (EC) introduced the concept of Sustainable Urban Mobility Plans (SUMPs) as a new planning paradigm with a focus on people
Year: 2016
Number Pages:
22p.
Author(s): Arsénio, E.; Martens, K.; Di Ciommo, F.
: Research in Transportation Economics
Editor: Elsevier
Volume:
462.
Keywords: Urban transport policy; Equity in transport; Sustainable urban mobility plans; Climate change
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Comunicação
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Portuguese mainland road network safety performance indicator
This paper presents the results of the application of the methodology proposed in the SafetyNet project to determine the road network safety performance indicator (SPI) to the entire Portuguese road network. This SPI aims at evaluating if, at the network level, the connections between urban centres within a region are made by the adequate type of roads regarding generic safety criteria. To this end, the connections to be assessed were classified. into one of pre-defined generic five safety levels, based on the population of the connected urban centres. Then, the safety assessment of these connections was carried out according to the characteristics of the cross-section type and associated environment of the existing roads connecting the two urban centres. If the connection is ensured by a road of higher or equal class than the pre-defined class, the link is considered to be the appropriate one. For each connection, the results of its evaluation are expressed as a binary value: 0 when the class is not appropriate; and 1 when it is appropriate. The evaluation results are weighted by the road length and aggregated by connection class and throughout the whole road network. For the year 2012 and the entire national road network, the results show a satisfactory network configuration with an SPI of 94%, corresponding to the percentage of connections with class equal to or higher than the adequate for the type of connection between urban centres they established.
Year: 2016
Author(s): Vieira Gomes, S.; Cardoso, J. L.; Lima Azevedo, C.
Editor: WCTR
Keywords: Road network; Spatial analysis; Geographic Information System; Safety Performance Indicator
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Single unprotected road user crashes: Europe we have a problem!
Unprotected Road Users (URU) are a subset of Vulnerable Road Users (VRU) who are not protected in their vehicles: pedestrians, cyclists and powered two-wheelers. EU statistics for 2014 show that their share in road traffic fatalities was 22% for pedestrians, 8% for cyclists and 18% for Powered Two-Wheelers, in total 47% of the fatalities. From explorative studies regarding injured road traffic casualties it is found that about two thirds of the transportation casualties are Unprotected Road Users, of which two thirds are single accidents, i.e. crashes where no other road user is involved. Most of these single crashes are not (yet) detected in the standard police reported accident statistics, but do represent costs to society that probably exceed crash costs of car related crashes. It can be expected that the shares of URU fatal and injury crashes will increase, particularly because of the ageing of the population, urbanization and despite ICT/ITS developments. Some of these crashes can be prevented by relatively simple measures, others need more investments e.g. infrastructure, legislation or enforcement. From a policy point of view it will be wise to address this issue, not only for road safety reasons, but also because the elderly are getting more numerous and a serious economic and political factor.
Year: 2016
Number Pages:
9 p.
Author(s): Methorst, R.; Eenink, R.; Cardoso, J. L.; Machata, K.; Malasek, J.
Editor: Elsevier B.V..
Keywords: Vulnerable road users; Pedestrians; Cycling; Serious injuries; Elderly; Road safety
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Using the sustainable mobility planning tool to accelerate urban sustainability transitions: sharing experiences between Europe and Latin America.
How to make mobility in cities greener (low carbon), more resource-efficient and fair in terms of providing a cost-effective accessibility to all citizens
Year: 2016
Number Pages:
20p.
Author(s): Arsénio, E.; Arioli M.; Amaral, M.; Lah O.; Caccia, L.
Editor: ICLEI - Local Governments for Sustainability
Keywords: Cost-effectiveness; Transport intermodality; Low carbon urban transport; Sustainable urban mobility plans; Stakeholders' engagement; Urban mobility observatory; Car sharing; Bicycle sharing; Electric mobility; Bus rapid transit; City of Bremen; City of Belo Horizonte; Transport planning; Transport innovation
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Equity in transportation and health: what can we learn from each other?
Equity research in health has much to offer to equity exploration in transportation. The objective of this paper is to study whether and how equity issues are addressed in transportation and in health. We wish to create parallels between equity evaluation in these two fields, in order to be able to advance health care insights to the transportation sector, and by that to improve equity evaluation towards a more equitable assessment of transportation projects. The scope of the paper is limited, given the magnitude of published work in this subject. It is intended to offer a comprehensive overview, on selected topics, within heath and transportation assessment.
Year: 2015
Number Pages:
30p.
Author(s): Nahmias
Editor: University of Malta
Keywords: Transport and health; Equity evaluation; Gini index; Transport equity analysis; Transport planning; Transport policy
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Integrating large samples of errant vehicles encroachment angles from Google Street View in a roadside safety assessment framework
The encroachment angle when a vehicle leaves the carriageway is particularly relevant to the outcome of a run-off-road crash.In roadside safety assessment, encroachment angles are used in encroachment-based models, contributing to determine the frequency, severity and societal cost of roadside crashes. Additionally, they may be useful as criteria for clear zone design and in the performance evaluation of standardized crash tests of road restraint systems.Ideally, encroachment angles are representative of real crash departure trajectories. However, few studies are based on recently measured encroachment data. Data collected in the 1960
Year: 2015
Number Pages:
14p.
Author(s): Cardoso, J. L.; Roque, C. A.
Editor: Transportation Research Board
Keywords: Google street view; Skid marks; Run-off-road crash; Encroachment angle
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Modeling crash probability in large traffic simulators
Currently, traffic microscopic simulation is a common tool for road system analysis. However, only recently have attempts been carried out to its application in safety assessment; also, most approaches still ignore causal relationships between different levels of vehicle interactions or/and crash types, lacking a valid representation of the crash phenomena itself. In this paper, a new generic probabilistic safety assessment framework for traffic microscopic simulation tools is proposed, as developed within the context of intelligent urban motorway speed limit management.The probability of a specific crash occurrence is assumed as estimable by a crash propensity function, with a random component and a deterministic safety score component. This component depends on the type of occurrence, detailed vehicle interactions and manoeuvres, and simulation modelling features. The generic model is specified for no-crash events and three types of crash events (rear-end, lane-changing, and run-off-road) in a nested (logit) structure.Artificial trajectories from a detailed calibrated microscopic simulation tool were used in the safety model fitting. Improved trajectory replication was obtained by a novel detailed comprehensive calibration effort: real trajectories were extracted from generic scenarios; the simulation tool was calibrated using the collected trajectories; lastly, the simulation model was re-calibrated using aggregate data from each selected replicated event.The final estimated safety model allowed for the identification and interpretation of several simulated vehicle interactions (only 9% false crash alarms). The fact that these considerations were extracted from simulated runs shows the real potential of traffic microscopic simulation for detailed safety assessments in road design.
Year: 2015
Number Pages:
18p.
Author(s): Cardoso, J. L.; Lima Azevedo, C.; Ben-Akiva, M.
Editor: Transportation Research Board
Keywords: Road safety; Surrogate safety measures; Probabilistic modelling; Traffic microscopic simulation
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Reconsidering social equity in urban transport choices: putting women and the elderly in the mobility agenda.
This paper aims to present the research study conducted in the city of Brindisi in Italy: it is a city of 89,846 inhabitants with a density of 270/km2, where the Public Transport Company of Brindisi (S.T.P. SpA) provides public transportation in the city with 54 buses and 19 lines. Our research focus is on urban transport choices that cover most vulnerable users. Mobility data was collected in 2013 by running a survey on 581 housing units. The idea is to illustrate through real data and empirical results that link mobility needs and behaviour of the population in Brindisi, with a particular focus on some population groups.Through the statistical analysis of data, several insights are provided on needs of specific user groups such as the elderly and women, as gender issues and social equity are key aspects to consider in urban policies. In addition, the potential willingness to pay of users to obtain a general improvement in bus service quality is investigated through discrete choice modelling. The idea behind this study is to overcome the crucial impediment in understanding urban travel patterns and the key forces behind user attitudes which normally characterise city dynamics. Therefore, attitudinal and behavioural variables are considered to evaluate the propensity of using buses and changing habits for modal choices by the elderly and women through a random utility model.
Year: 2015
Number Pages:
24p.
Author(s): Venezia, E; Arsénio, E.
: Proceedings from the 14th International Conference on Mobility and Transport for Elderly and Disabled Persons
Editor: IST Técnico
Keywords: Binary logistic regression; Stated-choice analysis; Mobility survey; Gender issues; Accessibility needs; Public transport; Social equity; Sustainable mobility
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Sustainable urban mobility plans and equity inclusion: what is needed?
The European Commission (EC) introduced the concept of
Year: 2015
Number Pages:
16p.
Author(s): Arsénio, E.; Martens, K.; Ciommo, F.
Editor: University of Malta
Keywords: Transport policy and planning; European transport policy; Equity inclusion; Sustainable urban mobility plans; Transport equity analysis
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The role of urban parks in cities
The concerns on the preservation of the natural environment have focus mainly on large ecosystems protection. These areas are usually distant from the urban environment, where only relatively smaller natural spaces can survive. These small-scale green areas are often disregarded, when compared with the large ones, and many of their benefits are diminished. However, the urban nature provides important social and psychological benefits to human societies, which enrich human life. They provide spaces for social interaction, enhancing the community cohesion, while contributing for a healthier lifestyle. Another advantage is related to the air quality improvement and climate protection due to their ability to store carbon. Although public preferences for environmental attributes may vary among individual citizens according to their socio-economics characteristics and daily activities, these benefits are well recognized by most citizens, having clear consequences on housing choices. Furthermore, green spaces may be used as factors to increase the attractiveness of a city, by making the city green and pleasant. The main concern of this paper is to address the importance of green areas for the urban citizens, andto analyse their distribution in consolidated cities. A case study for the city of Lisbon, Portugal ispresented, where spatial distribution, distance from residential areas and population satisfaction is analysed, amongst other indicators.
Year: 2015
Author(s): Vieira Gomes, S.; Florentino, T.
Editor: 22nd European Real Estate Society Annual Conference
Keywords: linear modeling; spatial analysis; citizens satisfaction; urban parks
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Cost-Benefit Analysis of Future Vehicle Technologies: exploring electric vehicle sharing schemes and intermodality in Lisbon.
This paper presents a comparative cost-benefit analysis of future vehicle technologies and electric mobility services until 2030 for the case of Lisbon Metropolitan area (LMA). The roles of electric vehicles (car, scooter and bike sharing) along with intermodal transport (train and underground) are explored as a means to improve the sustainability of the passenger transport sector. The methodology considered a life-cycle assessment of Battery-powered Electric Vehicles (BEVs) and Internal Combustion Engine Vehicles - gasoline (ICEVs), taking the perspective of the user, in terms of CO2 and energy consumption. The analysis covered emissions along the entire chain of production and usage of vehicles
Year: 2014
Number Pages:
10.
Author(s): Prata, J.; Arsénio, E.
Editor: European Commission - Joint Research Centre
Keywords: Low carbon technologies; Energy efficiency; Intermodal passenger transport; Bike-sharing; Car-sharing; Electric bicycles; Baterry electric vehicles; Cost-benefit analysis
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Books
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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.
Year: 2012
Number Pages:
10.
Author(s): 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.
Year: 2010
Number Pages:
20pp.
Author(s): 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.
Year: 2010
Number Pages:
274p..
Author(s): 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.
Year: 2010
Number Pages:
80p..
Author(s): Arsénio, E.; Viegas, F.
Editor: Agência Portuguesa do Ambiente (APA)
Volume:
Volume I.
Keywords: Planeamento de transportes; Mobilidade sustentável
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Capítulo de Livro
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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.
Year: 2021
Number Pages:
109-124.
Author(s): Roque, C. A.
: 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.
Year: 2021
Number Pages:
71-96pp.
Author(s): Vieira Gomes, S.; Cardoso, J. L.
: 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.
Year: 2021
Number Pages:
97-108.
Author(s): Roque, C. A.; Cardoso, J. L.
: 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
Year: 2020
Number Pages:
204-208pp.
Author(s): Vieira Gomes, S.; Roque, C. A.; Cardoso, J. L.
: 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
Year: 2018
Number Pages:
109-122pp.
Author(s): Arsénio, E.; Coelho, J.
: 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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Tese 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.
Year: 2010
Number Pages:
371.
Author(s): 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.
Year: 1996
Author(s): 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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Relatório Científico
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Distração na condução em Portugal motivada pelo uso do telemóvel - Ano de 2022
O presente relatório refere-se a um estudo de caracterização do comportamento do condutor no quese refere à utilização de dispositivos móveis durante a condução, nas principais categorias de estradasde Portugal, efetuado pelo LNEC no âmbito do projeto europeu Baseline, cofinanciado pela ComissãoEuropeia (CE).O projeto Baseline destinou-se ao desenvolvimento de indicadores do desempenho do sistema detransporte rodoviário na ótica da segurança (IDS) e nos quais se inclui um relativo à distração nacondução motivada pela utilização de telemóveis ou outros dispositivos móveis.Foi utilizada a metodologia de recolha de dados proposta no âmbito do projeto, que estabelece diversoscritérios relativos, designadamente, à seleção de locais, à dimensão da amostra e ao procedimento derecolha de dados. São apresentados os valores de IDS calculados para três classes de rodovia:autoestadas, estradas interurbanas e arruamentos urbanos. Os dados referem-se unicamente a diasúteis. Os trabalhos de campo decorreram em 2022.Observou-se que a maioria dos condutores nas autoestradas, estradas interurbanas e urbanas nãoutiliza dispositivos móveis enquanto conduz, com uma taxa ligeiramente superior de conformidade nasautoestradas, atingindo um IDS de 98%. Relativamente à desagregação por tipo de veículo, verificousemaior frequência de utilização de dispositivos móveis pelos condutores de veículos ligeiros demercadorias do que pelos condutores de outros tipos de veículos (nos condutores de autocarros foimesmo residual).
Year: 2024
Author(s): Vieira Gomes, S.; Cardoso, J. L.
Keywords: Segurança Rodoviária; Indicador de desempenho; Distração
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Documento normativo para aplicação a arruamentos urbanos - Relatório de ponderação da consulta pública
O presente trabalho insere-se no âmbito de um protocolo entre o Instituto da Mobilidade e dosTransportes, I.P. (IMT) e o Laboratório Nacional de Engenharia Civil (LNEC) e consiste no relatório deponderação do processo de consulta pública a que foi sujeito o documento normativo para aplicação aarruamentos urbanos, recentemente concluído.
Year: 2024
Author(s): Vieira Gomes, S.; Roque, C. A.; Cardoso, J. L.
Keywords: Consulta pública; Arruamentos urbanos; Norma de traçado
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Velocidades praticadas pelos condutores nas estradas Portuguesas - Ano de 2022
Refere-se o presente relatório a um estudo de caracterização das distribuições de velocidades praticadas pelos condutores nas principais categorias de estradas de Portugal, sob condições diversificadas de tráfego e luminosidade, efetuado pelo LNEC no âmbito do projeto europeu Baseline, cofinanciado pela Comissão Europeia (CE). O projeto Baseline destinou-se ao desenvolvimento de indicadores do desempenho do sistema de transporte rodoviário na óptica da segurança (designados por KPI
Year: 2022
Author(s): Cardoso, J. L.; Vieira Gomes, S.
Keywords: Segurança rodoviária; Indicador de desempenho; Velocidade
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Technical and scientific foundations for the 2020-2030 road safety strategy - Current situation and emerging challenges
The Portuguese Road Safety Authority (Autoridade Nacional de Segurança Rodoviária
Year: 2021
Author(s): Cardoso, J. L.; Vieira Gomes, S.; Roque, C. A.; Wegman, F.
Keywords: Statistics; Planning; Strategy; Road Safety
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Technical and scientific foundations for the 2021-2030 Road Safety Strategy - Methodology for the preparation of biennial action plans
The Portuguese Road Safety Authority (Autoridade Nacional de Segurança Rodoviária
Year: 2021
Author(s): Cardoso, J. L.; Vieira Gomes, S.; Roque, C. A.; Wegman, F.
Keywords: Statistics; Planning; Strategy; Road Safety
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Deteção de zonas de acumulação de acidentes na Rede Rodoviária Nacional - Período de 2013 a 2017
O presente relatório foi elaborado no âmbito da colaboração do LNEC com a Autoridade Nacional deSegurança Rodoviária (ANSR), o Instituto da Mobilidade e dos Transportes (IMT) e a Infraestruturas dePortugal S.A., na identificação de zonas de acumulação de acidentes rodoviários na Rede RodoviáriaNacional com base em dados do período de 2013 a 2017. O estudo enquadra-se na medida A20.80 doPENSE 2020 - Plano Estratégico Nacional de Segurança Rodoviária. Neste relatório são apresentados os resultados obtidos com a deteção de zonas de acumulação de acidentes nas estradas da Rede Rodoviária Nacional não subconcessionadas pela IP, bem como algumas características da sinistralidade nessas zonas.
Year: 2020
Author(s): Cardoso, J. L.
Keywords: Rede nacional; Sinistralidade; Zona de acumulação de acidentes
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Fascículo II - Características geométricas para rodovias com tráfego motorizado.
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
Year: 2020
Author(s): Vieira Gomes, S.; Roque, C. A.; Arsénio, E.; Ferreira, J.; Cardoso, J. L.
Keywords: Ambiente rodoviário; Arruamentos urbanos; Norma de traçado
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Fascículo III - Características geométricas para vias de tráfego não motorizado
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
Year: 2020
Author(s): Vieira Gomes, S.; Cardoso, J. L.; Roque, C. A.; Arsénio, E.; Ferreira, J.
Keywords: Ambiente rodoviário; Arruamentos urbanos; Norma de traçado
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Fascículo IV - Medidas de acalmia e outros dispositivos de tráfego.
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
Year: 2020
Author(s): Vieira Gomes, S.; Roque, C. A.; Cardoso, J. L.; Ferreira, J.
Keywords: Ambiente rodoviário; Arruamentos urbanos; Norma de traçado
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A TRAIN-THE-TRAINER COURSE
Work package 6 of the SaferAfrica project aims to identify training needs and develop capacity building programs focused on road safety in African countries. Part 2 of WP6 concentrates on train the-trainer activities for universities. The main objective was the development of a train-the-trainer manual in the way that trainers and future trainers will be provided with the necessary tools and skills to prepare their own road safety courses. This manual was developed in 2018 and is now available as Deliverable D6.2. (Sanon, C. et al., 2018). The first part of the Manual presents basic information about the
Year: 2019
Author(s): Vieira Gomes, S.; Wounba, J.; Kluppels, L.
Keywords: Safe System; Train-The-Trainer course; Africa; capacity building; training needs; Road safety
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ICT
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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
Year: 2018
Author(s): 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
Year: 2011
Number Pages:
152pp.
Author(s): 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
Year: 2011
Number Pages:
51pp.
Author(s): 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
Year: 2009
Number Pages:
153pp.
Author(s): Lopes, S.; Cardoso, J. L.
Editor: LNEC
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Outro
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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
Year: 2018
Author(s): 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.
Year: 2017
Author(s): 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
Year: 2016
Author(s): 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.
Year: 2014
Number Pages:
16pp.
Author(s): 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
Year: 2010
Number Pages:
30p..
Author(s): 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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