Jorge M. Bandeira is researcher at the Centre for Mechanical Technology and automation of the University of Aveiro. Currently, his research interests are focused on traffic and emissions modelling, eco-navigation, traffic assignment and network optimization, as well as Cooperative Intelligent Transportation Systems Impacts and mobility data.
Abstract This study develops an information system for cycling navigation based on seven differen... more Abstract This study develops an information system for cycling navigation based on seven different bikeability indicators: travel time, energy expenditure, effort distribution, infrastructure performance, safety, comfort and emission hotspots. Therefore, field data were collected in a selected cycling network map of Aveiro, Portugal, during the weekdays’ afternoon peak hour period. A conventional aluminum bicycle equipped with a GNSS data logger, a wireless heart rate recorder device and a video camera were used. Using the defined methodologies as well as GPS Visualizer and ArcGIS, a total of 8 hours of video and approximately 100.000 second by second data points were analyzed and organized through a 449-link map. Through three case studies, several optimal solutions for different OD pairs were studied using Dijkstra’s shortest path algorithm. Results show significant tradeoffs between the traced routes according to the chosen type of indicator, pointing the information system’ utility in providing useful information to cyclists and support management systems.
This research explores the effects of the integration of automated vehicles (AVs) connecting a un... more This research explores the effects of the integration of automated vehicles (AVs) connecting a university campus and a science park and its impacts on traffic performance as well as pollutant emissions and road conflicts. Using an integrated platform for microscopic modelling of traffic, emissions and safety, several scenarios with multiple AVs penetration rates were simulated. The analysis consisted of assessing the pollutant emissions and road safety with the VSP and SSAM methodologies for the various scenarios. The environmental performance of the network was significantly improved with the increase in the number of AVs. On average, around 8% reductions in pollutant emissions (carbon dioxide, nitrogen oxides) and 10% on the total number of road conflicts for 50% AV penetration was observed. Emissions were reduced by 50% when half of the AV fleet is electric, even considering the emissions produced for electricity generation.
Advances in intelligent systems and computing, Nov 1, 2019
The main objective of this paper is to analyse the impacts of the overtaking lateral distance bet... more The main objective of this paper is to analyse the impacts of the overtaking lateral distance between a bicycle and a motor vehicle (MV) on road safety and energy consumption at two-lane urban roads. An on-board sensor platform was installed on a probe bicycle to measure the overtaking lateral distance and dynamic data. The Bicycle Specific Power (BSP) methodology was used to estimate human required power to ride a bicycle while Vehicle Specific Power (VSP) was used for MVs. The results showed that 50% of overtaking lateral distance were lower than 0.5 m in the peak hours. The BSP and VSP analyses for different values of overtaking lateral distance did not result in any relationship between variables. There was a good fit (R2 > 0.67) between traffic volumes and overtaking lateral distance in the peak hours. On average, the MVs energy consumption in the afternoon was 92% higher than the morning peak periods.
Despite constant technological innovation, road transport remains a significant source of polluta... more Despite constant technological innovation, road transport remains a significant source of pollutant emissions, and effective driver-behaviour changes can be considered as solutions that can increase the sustainability of road traffic in a short period. Thus, understanding driver behaviour plays a key role in assessing traffic-related impacts. Since real-world experiments entail some risks and are often not flexible, simulator-based experiments can be relevant to studying vehicle dynamics and driver behaviour. However, the reliability of the simulation results’ accuracy must be ensured. The primary objective of this paper is to present an exploratory analysis focused on the study of the reliability of a driving simulator to reproduce driving parameters that can then be used for emission estimation. For that purpose, tests were conducted by two drivers for urban and highway scenarios performed on a driving simulator and in real-world environments. Different road singularities composed...
The most direct impacts of road transport relate to traffic congestion, road safety, fuel consump... more The most direct impacts of road transport relate to traffic congestion, road safety, fuel consumption, greenhouse gases emissions, pollutants concentrations/air quality and noise levels. The implementation of environmental policies in the transportation sector should consider the level of contribution of each externality and its geographical scale. Thus, in a context of increasing data availability, a relevant research topic is to explore the nature of these dynamic externalities, in order to efficiently manage current road networks. The fundamental goal of this 30-month project is to integrate road traffic impacts into a single analytical framework for use in advanced traffic management systems (ATMS). The work plan is founded on 3 main pillars: a) Designing a conceptual methodology for assigning a link-based indicator that can evaluate different traffic-related externalities, adjusted to local contexts of vulnerability; b) Improving the interoperability between traffic-related mod...
In Europe, the number of road traffic deaths and injuries is still far too high and the European ... more In Europe, the number of road traffic deaths and injuries is still far too high and the European Union is committed in improving road safety and move closer to the target of approaching zero road fatalities by 2050. For that purpose, new strategies based on the Safe System approach to preventing deaths and serious injuries for all road users should be developed. Road transport is a major source of pollutant emissions. In particular, it is responsible for the emission of harmful pollutants such as nitrogen oxides (NOx) and carbon dioxide (CO2), which has serious impacts in global warming [1]. It is known that driver behavior can play a key role in what concerns road crashes and pollutant emissions. Such impacts increase when associated to aggressive behavior, experiencing high and extreme levels of fuel consumption, speed and acceleration. A deep understanding of driver behavior should be an important step to improve road safety. Various studies have been conducted to identify driver...
Em cidades de média dimensão com baixa densidade populacional, o sistema de transporte públicos t... more Em cidades de média dimensão com baixa densidade populacional, o sistema de transporte públicos tende a ser deficitário, sendo, portanto, a utilização do veículo rodoviário individual o modo de transporte predominante. A utilização deste meio de transporte pode levar a congestionamento a certas horas do dia, implicando um aumento das emissões. Neste trabalho propôs-se estudar a influência que o congestionamento tem nas emissões e nos custos ambientais. Com este objetivo, num caso de estudo, foi estimado o aumento de emissões/custos que um cenário com congestionamento tem em relação a um cenário sem congestionamento. Foi verificada a emissão de poluentes para um veículo típico a diesel e um a gasolina, e para um cenário de congestionamento as emissões de CO2 aumentaram 32% e 46%, e os custos ambientais 33% e 46%, respetivamente para cada tipo de veículo. Neste estudo foi também possível desenvolver modelos que descrevem os custos ambientais em função do tempo de viagem e da distância...
O setor dos transportes é responsável por grande parte da emissão de poluentes e a União Europeia... more O setor dos transportes é responsável por grande parte da emissão de poluentes e a União Europeia tem vindo a introduzir medidas de padrões tecnológicos em motores para promover uma mobilidade mais eficiente e ecológica. O presente estudo avalia a contribuição do parque automóvel nas emissões de poluentes e nos custos associados em quatro países Europeus com diferentes características: Portugal, Roménia, Espanha e Suécia. Os resultados mostram que uma mudança tecnológica nos motores dos veículos contribui para reduzir impactos ambientais e económicos dos transportes. Apesar do crescimento da frota, nos últimos anos assistiu-se a uma estabilização ou mesmo diminuição nas emissões, mas comparativamente aos dados do ano 2000, Portugal foi o único a apresentar um decréscimo nas emissões de CO2
No âmbito do desenvolvimento de uma plataforma integrada de gestão de tráfego cooperativa, o pres... more No âmbito do desenvolvimento de uma plataforma integrada de gestão de tráfego cooperativa, o presente trabalho explora o potencial de fontes alternativas de dados de atividade urbana, para prever condições de tráfego e auxiliar a estimativa dos impactes decorrentes do tráfego rodoviário. Para dois casos de estudo, em Aveiro e Badajoz, os sistemas de informação cooperativa mostraram ser ferramentas eficazes para a estimativa custos de ambientais relacionados com ruído, gases com efeito de estufa (CO2) e poluentes atmosféricos (NOX, HC, PM). Tendo em consideração os fatores de custo sugeridos na literatura e adaptados ao contexto geográfico do caso de estudo português, os impactos de emissões de CO2 tendem a assumir uma relevância significativa, seguidos da matéria particulada e ruído
Abstract This study develops an information system for cycling navigation based on seven differen... more Abstract This study develops an information system for cycling navigation based on seven different bikeability indicators: travel time, energy expenditure, effort distribution, infrastructure performance, safety, comfort and emission hotspots. Therefore, field data were collected in a selected cycling network map of Aveiro, Portugal, during the weekdays’ afternoon peak hour period. A conventional aluminum bicycle equipped with a GNSS data logger, a wireless heart rate recorder device and a video camera were used. Using the defined methodologies as well as GPS Visualizer and ArcGIS, a total of 8 hours of video and approximately 100.000 second by second data points were analyzed and organized through a 449-link map. Through three case studies, several optimal solutions for different OD pairs were studied using Dijkstra’s shortest path algorithm. Results show significant tradeoffs between the traced routes according to the chosen type of indicator, pointing the information system’ utility in providing useful information to cyclists and support management systems.
This research explores the effects of the integration of automated vehicles (AVs) connecting a un... more This research explores the effects of the integration of automated vehicles (AVs) connecting a university campus and a science park and its impacts on traffic performance as well as pollutant emissions and road conflicts. Using an integrated platform for microscopic modelling of traffic, emissions and safety, several scenarios with multiple AVs penetration rates were simulated. The analysis consisted of assessing the pollutant emissions and road safety with the VSP and SSAM methodologies for the various scenarios. The environmental performance of the network was significantly improved with the increase in the number of AVs. On average, around 8% reductions in pollutant emissions (carbon dioxide, nitrogen oxides) and 10% on the total number of road conflicts for 50% AV penetration was observed. Emissions were reduced by 50% when half of the AV fleet is electric, even considering the emissions produced for electricity generation.
Advances in intelligent systems and computing, Nov 1, 2019
The main objective of this paper is to analyse the impacts of the overtaking lateral distance bet... more The main objective of this paper is to analyse the impacts of the overtaking lateral distance between a bicycle and a motor vehicle (MV) on road safety and energy consumption at two-lane urban roads. An on-board sensor platform was installed on a probe bicycle to measure the overtaking lateral distance and dynamic data. The Bicycle Specific Power (BSP) methodology was used to estimate human required power to ride a bicycle while Vehicle Specific Power (VSP) was used for MVs. The results showed that 50% of overtaking lateral distance were lower than 0.5 m in the peak hours. The BSP and VSP analyses for different values of overtaking lateral distance did not result in any relationship between variables. There was a good fit (R2 > 0.67) between traffic volumes and overtaking lateral distance in the peak hours. On average, the MVs energy consumption in the afternoon was 92% higher than the morning peak periods.
Despite constant technological innovation, road transport remains a significant source of polluta... more Despite constant technological innovation, road transport remains a significant source of pollutant emissions, and effective driver-behaviour changes can be considered as solutions that can increase the sustainability of road traffic in a short period. Thus, understanding driver behaviour plays a key role in assessing traffic-related impacts. Since real-world experiments entail some risks and are often not flexible, simulator-based experiments can be relevant to studying vehicle dynamics and driver behaviour. However, the reliability of the simulation results’ accuracy must be ensured. The primary objective of this paper is to present an exploratory analysis focused on the study of the reliability of a driving simulator to reproduce driving parameters that can then be used for emission estimation. For that purpose, tests were conducted by two drivers for urban and highway scenarios performed on a driving simulator and in real-world environments. Different road singularities composed...
The most direct impacts of road transport relate to traffic congestion, road safety, fuel consump... more The most direct impacts of road transport relate to traffic congestion, road safety, fuel consumption, greenhouse gases emissions, pollutants concentrations/air quality and noise levels. The implementation of environmental policies in the transportation sector should consider the level of contribution of each externality and its geographical scale. Thus, in a context of increasing data availability, a relevant research topic is to explore the nature of these dynamic externalities, in order to efficiently manage current road networks. The fundamental goal of this 30-month project is to integrate road traffic impacts into a single analytical framework for use in advanced traffic management systems (ATMS). The work plan is founded on 3 main pillars: a) Designing a conceptual methodology for assigning a link-based indicator that can evaluate different traffic-related externalities, adjusted to local contexts of vulnerability; b) Improving the interoperability between traffic-related mod...
In Europe, the number of road traffic deaths and injuries is still far too high and the European ... more In Europe, the number of road traffic deaths and injuries is still far too high and the European Union is committed in improving road safety and move closer to the target of approaching zero road fatalities by 2050. For that purpose, new strategies based on the Safe System approach to preventing deaths and serious injuries for all road users should be developed. Road transport is a major source of pollutant emissions. In particular, it is responsible for the emission of harmful pollutants such as nitrogen oxides (NOx) and carbon dioxide (CO2), which has serious impacts in global warming [1]. It is known that driver behavior can play a key role in what concerns road crashes and pollutant emissions. Such impacts increase when associated to aggressive behavior, experiencing high and extreme levels of fuel consumption, speed and acceleration. A deep understanding of driver behavior should be an important step to improve road safety. Various studies have been conducted to identify driver...
Em cidades de média dimensão com baixa densidade populacional, o sistema de transporte públicos t... more Em cidades de média dimensão com baixa densidade populacional, o sistema de transporte públicos tende a ser deficitário, sendo, portanto, a utilização do veículo rodoviário individual o modo de transporte predominante. A utilização deste meio de transporte pode levar a congestionamento a certas horas do dia, implicando um aumento das emissões. Neste trabalho propôs-se estudar a influência que o congestionamento tem nas emissões e nos custos ambientais. Com este objetivo, num caso de estudo, foi estimado o aumento de emissões/custos que um cenário com congestionamento tem em relação a um cenário sem congestionamento. Foi verificada a emissão de poluentes para um veículo típico a diesel e um a gasolina, e para um cenário de congestionamento as emissões de CO2 aumentaram 32% e 46%, e os custos ambientais 33% e 46%, respetivamente para cada tipo de veículo. Neste estudo foi também possível desenvolver modelos que descrevem os custos ambientais em função do tempo de viagem e da distância...
O setor dos transportes é responsável por grande parte da emissão de poluentes e a União Europeia... more O setor dos transportes é responsável por grande parte da emissão de poluentes e a União Europeia tem vindo a introduzir medidas de padrões tecnológicos em motores para promover uma mobilidade mais eficiente e ecológica. O presente estudo avalia a contribuição do parque automóvel nas emissões de poluentes e nos custos associados em quatro países Europeus com diferentes características: Portugal, Roménia, Espanha e Suécia. Os resultados mostram que uma mudança tecnológica nos motores dos veículos contribui para reduzir impactos ambientais e económicos dos transportes. Apesar do crescimento da frota, nos últimos anos assistiu-se a uma estabilização ou mesmo diminuição nas emissões, mas comparativamente aos dados do ano 2000, Portugal foi o único a apresentar um decréscimo nas emissões de CO2
No âmbito do desenvolvimento de uma plataforma integrada de gestão de tráfego cooperativa, o pres... more No âmbito do desenvolvimento de uma plataforma integrada de gestão de tráfego cooperativa, o presente trabalho explora o potencial de fontes alternativas de dados de atividade urbana, para prever condições de tráfego e auxiliar a estimativa dos impactes decorrentes do tráfego rodoviário. Para dois casos de estudo, em Aveiro e Badajoz, os sistemas de informação cooperativa mostraram ser ferramentas eficazes para a estimativa custos de ambientais relacionados com ruído, gases com efeito de estufa (CO2) e poluentes atmosféricos (NOX, HC, PM). Tendo em consideração os fatores de custo sugeridos na literatura e adaptados ao contexto geográfico do caso de estudo português, os impactos de emissões de CO2 tendem a assumir uma relevância significativa, seguidos da matéria particulada e ruído
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