Abstract. This paper describes a numerical solution method for a dynamic network loading model th... more Abstract. This paper describes a numerical solution method for a dynamic network loading model that is consistent with the first order kinematic wave theory. The proposed procedure, called link transmission model (LTM), only requires calculations at network nodes. Compared to the cell transmission model (CTM), the computational complexity of the LTM is about n times smaller for the same level of accuracy, where n is the mean amount of cells in a homogeneous network link. 1.
A combination of two dynamic models is presented to explore optimal congestion pricing in a multi... more A combination of two dynamic models is presented to explore optimal congestion pricing in a multi-destination network. Vickrey's bottleneck model (1) deals with traffic demand while traffic operations are described by the LWR traffic flow model (Lighthill and Whitham, 2 and Richards, 3). The proposed combined LWR bottleneck model determines both user equilibrium and system optimum network conditions. It provides some surprising insights in the mechanisms of congestion. Congestion may be avoided by imposing an optimal dynamic toll. This has a significant positive impact on the performance of a network. A paradox appears where an optimal toll even lowers total trip costs and increases traffic demand, without introducing congestion. Analysis with the combined LWR bottleneck model shows that congestion pricing can be even more beneficial than accepted until now.
A combination of two dynamic models is presented to explore optimal congestion pricing in a multi... more A combination of two dynamic models is presented to explore optimal congestion pricing in a multi-destination network. Vickrey's bottleneck model (1969) deals with traffic demand while traffic operations are described by the LWR traffic flow model (Lighthill and Whitham, 1955 and Richards, 1956). The proposed combined LWR bottleneck model determines both user equilibrium and system optimum network conditions. It provides some surprising insights in the mechanisms of congestion. Congestion may be avoided by imposing an optimal dynamic toll. This has a significant positive impact on the performance of a network. A paradox appears where an optimal toll even lowers total trip costs and increases the traffic volume, without introducing congestion. Analysis with the combined LWR bottleneck model shows that congestion pricing can be even more beneficial than accepted until now.
2015 International Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS), 2015
Applying the current technological possibilities has led to a wide range of traffic monitoring sy... more Applying the current technological possibilities has led to a wide range of traffic monitoring systems. These heterogeneous data sources individually provide a view on the current traffic state, each source having its own properties and (dis)advantages. However, these different sources can be aggregated to create a single traffic state estimation. This paper presents a data fusion algorithm that combines data on the data sample level. The proposed system fuses floating car data with stationary detector data and was implemented on live traffic. Results show the fusion algorithm allows to eliminate individual source bias and alleviates source-specific limitations.
This paper presents a numerical solution method for a dynamic network loading (DNL) model that is... more This paper presents a numerical solution method for a dynamic network loading (DNL) model that is consistent with the first order kinematic wave theory. The multi-commodity link transmission model (MC LTM) determines time-dependent link volumes, link travel times and route travel times on a traffic network, given the time-dependent route flow rates. Compared to existing cell transmission models, the MC LTM provides the same realism of traffic flow propagation. The computational complexity however is substantially smaller, since the procedure requires only calculations at network nodes.
Dynamische verkeerstoedelingsmodellen worden gebruikt om de impact van infrastructuuraanpassingen... more Dynamische verkeerstoedelingsmodellen worden gebruikt om de impact van infrastructuuraanpassingen in verkeersnetwerken te voorspellen en om de effecten van informatieverstrekking en verkeesbeheersingsmaatregelen in te schatten. Een verkeerssimulatiemodel is een basiscomponent van het dynamisch toedelingsmodel. In dit eindwerk wordt een verkeerssimulatiemodel ontwikkeld. Het Link Transmissie Model simuleert verkeersstromen in grote feitelijke netwerken die zowel snelwegen als stedelijke regio’s omvatten. Het gemodelleerde file-opbouw en file-afbouw proces sluit nauwer aan bij de realiteit dan in state-of-the-art macroscopische verkeerstoedelingsmodellen. Op kruispunten worden lokale capaciteitsbeperkingen en knoopvertragingen gedetailleerd in rekening gebracht. Het Link Transmissie Model stoelt op een rekenefficiënt algoritme waardoor verkeersstromen in grote netwerken gesimuleerd kunnen worden in een beperkte rekentijd
On a turbo-roundabout, traffic streams are separated into separate lanes before they arrive at th... more On a turbo-roundabout, traffic streams are separated into separate lanes before they arrive at the roundabout and they stay in lane on the roundabout itself. This principle highly benefits roundabout capacity. To accurately assess the capacity of a turbo-roundabout, one can use a ...
The development and validation of a model for dynamic traffic noise prediction is presented. The ... more The development and validation of a model for dynamic traffic noise prediction is presented. The model is composed of a GIS-based traffic microsimulation part coupled with an emission model, and a beamtrace-based 2.5D propagation part, which takes into account multiple reflections and diffractions. The model can be used to analyze the influence of real urban traffic situations (e.g., traffic flow management, road saturation) in the usual equivalent sound level maps. However, it also allows to calculate and visualize statistical noise levels and indicators derived from them. Novel descriptors based on the power spectrum of noise level fluctuations can be obtained. A part of Gentbrugge, Belgium, is taken as a validation area; different traffic demand scenarios are simulated.
... INT PANIS*, Tim ASPERGES**, Jeroen BASTIAENS**, Veerle BEYST**, Dick BOTTELDOOREN***, Ann COL... more ... INT PANIS*, Tim ASPERGES**, Jeroen BASTIAENS**, Veerle BEYST**, Dick BOTTELDOOREN***, Ann COLLES*, Erwin CORNELIS*, Luc DEKONININCK***, Tom DE MUER ... attempt of coupling this type of dynamic models to liveability aspects was set up recently by Giorgi et al. ...
Abstract: This paper presents a method for including intersection delays in a flow-based traffic ... more Abstract: This paper presents a method for including intersection delays in a flow-based traffic model. The original Multi-Commodity Link Transmission Model (MC LTM), a Dynamic Network Loading (DNL) model that is consistent with kinematic wave theory, is extended with delayed urban intersection models. Travel time as a function of traffic load becomes a monotonically increasing function, which is a desirable property in view of equilibrium calculation in DTA.
This paper describes a numerical solution method for a dynamic network loading model that is cons... more This paper describes a numerical solution method for a dynamic network loading model that is consistent with the first order kinematic wave theory. The proposed procedure, called link transmission model (LTM), only requires calculations at network nodes. Compared to the cell transmission model (CTM), the computational complexity of the LTM is about n times smaller for the same level of accuracy, where n is the mean amount of cells in a homogeneous network link.
Abstract. This paper describes a numerical solution method for a dynamic network loading model th... more Abstract. This paper describes a numerical solution method for a dynamic network loading model that is consistent with the first order kinematic wave theory. The proposed procedure, called link transmission model (LTM), only requires calculations at network nodes. Compared to the cell transmission model (CTM), the computational complexity of the LTM is about n times smaller for the same level of accuracy, where n is the mean amount of cells in a homogeneous network link. 1.
A combination of two dynamic models is presented to explore optimal congestion pricing in a multi... more A combination of two dynamic models is presented to explore optimal congestion pricing in a multi-destination network. Vickrey's bottleneck model (1) deals with traffic demand while traffic operations are described by the LWR traffic flow model (Lighthill and Whitham, 2 and Richards, 3). The proposed combined LWR bottleneck model determines both user equilibrium and system optimum network conditions. It provides some surprising insights in the mechanisms of congestion. Congestion may be avoided by imposing an optimal dynamic toll. This has a significant positive impact on the performance of a network. A paradox appears where an optimal toll even lowers total trip costs and increases traffic demand, without introducing congestion. Analysis with the combined LWR bottleneck model shows that congestion pricing can be even more beneficial than accepted until now.
A combination of two dynamic models is presented to explore optimal congestion pricing in a multi... more A combination of two dynamic models is presented to explore optimal congestion pricing in a multi-destination network. Vickrey's bottleneck model (1969) deals with traffic demand while traffic operations are described by the LWR traffic flow model (Lighthill and Whitham, 1955 and Richards, 1956). The proposed combined LWR bottleneck model determines both user equilibrium and system optimum network conditions. It provides some surprising insights in the mechanisms of congestion. Congestion may be avoided by imposing an optimal dynamic toll. This has a significant positive impact on the performance of a network. A paradox appears where an optimal toll even lowers total trip costs and increases the traffic volume, without introducing congestion. Analysis with the combined LWR bottleneck model shows that congestion pricing can be even more beneficial than accepted until now.
2015 International Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS), 2015
Applying the current technological possibilities has led to a wide range of traffic monitoring sy... more Applying the current technological possibilities has led to a wide range of traffic monitoring systems. These heterogeneous data sources individually provide a view on the current traffic state, each source having its own properties and (dis)advantages. However, these different sources can be aggregated to create a single traffic state estimation. This paper presents a data fusion algorithm that combines data on the data sample level. The proposed system fuses floating car data with stationary detector data and was implemented on live traffic. Results show the fusion algorithm allows to eliminate individual source bias and alleviates source-specific limitations.
This paper presents a numerical solution method for a dynamic network loading (DNL) model that is... more This paper presents a numerical solution method for a dynamic network loading (DNL) model that is consistent with the first order kinematic wave theory. The multi-commodity link transmission model (MC LTM) determines time-dependent link volumes, link travel times and route travel times on a traffic network, given the time-dependent route flow rates. Compared to existing cell transmission models, the MC LTM provides the same realism of traffic flow propagation. The computational complexity however is substantially smaller, since the procedure requires only calculations at network nodes.
Dynamische verkeerstoedelingsmodellen worden gebruikt om de impact van infrastructuuraanpassingen... more Dynamische verkeerstoedelingsmodellen worden gebruikt om de impact van infrastructuuraanpassingen in verkeersnetwerken te voorspellen en om de effecten van informatieverstrekking en verkeesbeheersingsmaatregelen in te schatten. Een verkeerssimulatiemodel is een basiscomponent van het dynamisch toedelingsmodel. In dit eindwerk wordt een verkeerssimulatiemodel ontwikkeld. Het Link Transmissie Model simuleert verkeersstromen in grote feitelijke netwerken die zowel snelwegen als stedelijke regio’s omvatten. Het gemodelleerde file-opbouw en file-afbouw proces sluit nauwer aan bij de realiteit dan in state-of-the-art macroscopische verkeerstoedelingsmodellen. Op kruispunten worden lokale capaciteitsbeperkingen en knoopvertragingen gedetailleerd in rekening gebracht. Het Link Transmissie Model stoelt op een rekenefficiënt algoritme waardoor verkeersstromen in grote netwerken gesimuleerd kunnen worden in een beperkte rekentijd
On a turbo-roundabout, traffic streams are separated into separate lanes before they arrive at th... more On a turbo-roundabout, traffic streams are separated into separate lanes before they arrive at the roundabout and they stay in lane on the roundabout itself. This principle highly benefits roundabout capacity. To accurately assess the capacity of a turbo-roundabout, one can use a ...
The development and validation of a model for dynamic traffic noise prediction is presented. The ... more The development and validation of a model for dynamic traffic noise prediction is presented. The model is composed of a GIS-based traffic microsimulation part coupled with an emission model, and a beamtrace-based 2.5D propagation part, which takes into account multiple reflections and diffractions. The model can be used to analyze the influence of real urban traffic situations (e.g., traffic flow management, road saturation) in the usual equivalent sound level maps. However, it also allows to calculate and visualize statistical noise levels and indicators derived from them. Novel descriptors based on the power spectrum of noise level fluctuations can be obtained. A part of Gentbrugge, Belgium, is taken as a validation area; different traffic demand scenarios are simulated.
... INT PANIS*, Tim ASPERGES**, Jeroen BASTIAENS**, Veerle BEYST**, Dick BOTTELDOOREN***, Ann COL... more ... INT PANIS*, Tim ASPERGES**, Jeroen BASTIAENS**, Veerle BEYST**, Dick BOTTELDOOREN***, Ann COLLES*, Erwin CORNELIS*, Luc DEKONININCK***, Tom DE MUER ... attempt of coupling this type of dynamic models to liveability aspects was set up recently by Giorgi et al. ...
Abstract: This paper presents a method for including intersection delays in a flow-based traffic ... more Abstract: This paper presents a method for including intersection delays in a flow-based traffic model. The original Multi-Commodity Link Transmission Model (MC LTM), a Dynamic Network Loading (DNL) model that is consistent with kinematic wave theory, is extended with delayed urban intersection models. Travel time as a function of traffic load becomes a monotonically increasing function, which is a desirable property in view of equilibrium calculation in DTA.
This paper describes a numerical solution method for a dynamic network loading model that is cons... more This paper describes a numerical solution method for a dynamic network loading model that is consistent with the first order kinematic wave theory. The proposed procedure, called link transmission model (LTM), only requires calculations at network nodes. Compared to the cell transmission model (CTM), the computational complexity of the LTM is about n times smaller for the same level of accuracy, where n is the mean amount of cells in a homogeneous network link.
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