112 results on '"Buisson, Christine"'
Search Results
2. Estimation of Train Dwell Times Based on High-Resolution Passenger Flow Data
- Author
-
Baali, Mehdi, primary, Kuipers, Ruben, additional, Coulaud, Rémi, additional, Buisson, Christine, additional, and Palmqvist, Carl-William, additional
- Published
- 2024
- Full Text
- View/download PDF
3. Methods for quantitative assessment of passenger flow influence on train dwell time in dense traffic areas
- Author
-
Cornet, Sélim, Buisson, Christine, Ramond, François, Bouvarel, Paul, and Rodriguez, Joaquin
- Published
- 2019
- Full Text
- View/download PDF
4. Impact of Variability of Car-Following Parameters on Road Capacity: The Simple Case of Newell’s Model
- Author
-
Gomez Patiño, Carlos Mario, primary, Buisson, Christine, additional, and Keyvan-Ekbatani, Mehdi, additional
- Published
- 2022
- Full Text
- View/download PDF
5. Replications in Stochastic Traffic Flow Models: Incremental Method to Determine Sufficient Number of Runs
- Author
-
Chiabaut, Nicolas, Buisson, Christine, Appert-Rolland, Cécile, editor, Chevoir, François, editor, Gondret, Philippe, editor, Lassarre, Sylvain, editor, Lebacque, Jean-Patrick, editor, and Schreckenberg, Michael, editor
- Published
- 2009
- Full Text
- View/download PDF
6. Merging behaviour: Empirical comparison between two sites and new theory development
- Author
-
Marczak, Florian, Daamen, Winnie, and Buisson, Christine
- Published
- 2013
- Full Text
- View/download PDF
7. Analyzing railroad congestion in a dense urban network through the use of a road traffic network fundamental diagram concept
- Author
-
Cuniasse, Pierre-Antoine, Buisson, Christine, Rodriguez, Joaquin, Teboul, Emmanuel, and de Almeida, David
- Published
- 2015
- Full Text
- View/download PDF
8. Key Variables of Merging Behaviour: Empirical Comparison between Two Sites and Assessment of Gap Acceptance Theory
- Author
-
Marczak, Florian, Daamen, Winnie, and Buisson, Christine
- Published
- 2013
- Full Text
- View/download PDF
9. Impact of variability of car-following parameters on road capacity: the simple case of Newell's model
- Author
-
Gomez-Patino, Carlos Mario, Buisson, Christine, Keyvan-Ekbatani, Mehdi, and Cadic, Ifsttar
- Subjects
LIMITATION DE VITESSE ,MODELE MACROSCOPIQUE ,MODELISATION ,CAR-FOLLOWING MODELS ,CAPACITY ,GESTION DU TRAFIC ,DEBIT DE VEHICULE ,AFFECTATION DU TRAFIC ,PARAMETERS VARIABILITY ,TRAFIC ROUTIER ,VOLUME DE TRAFIC ,[INFO.INFO-MO] Computer Science [cs]/Modeling and Simulation ,NEWELL'S MODEL ,CAPACITY DISTRIBUTION ,REGULATION DU TRAFIC - Abstract
We contribute to the vehicle-level analysis of two macroscopic features of the road traffic: capacity variability and capacity drop. In this paper, we focus only on the car-following behavior and leave the part related to lane-change maneuvers for the future research. In particular, we study a simplistic car-following model (Newell's with bounded acceleration) for a single-lane scenario. In this work, by introducing a speed limitation across a zone, a bottleneck with variable nominal capacity has been created. We use a continuous event-based numerical resolution method. Consequently, We are able to vary the three Newell's model parameters: maximal acceleration, minimal distance, reaction time. It has been shown that the variability of those car-following parameters (e.g., reaction-time, minimal-distance, and maximal-acceleration) has a strong impact on the pre-breakdown capacity variation and also on the queue discharge flow. It has been concluded that this parameters variability does impact the drop (provided that the maximal acceleration has a relatively high mean value). Various distribution shapes (uniform, truncated Gaussian, and Gamma) have been exploblack. It has been realized that this does not have any significant impact on the capacity distribution. Concerning the amplitude of the capacity distribution, we demonstrate that the reaction time is the parameter with the highest impact followed by the minimal distance. If all parameters vary with an amplitude of 30 \%, we show that the capacity standard deviation, in this scenario without lane changes, is about half the experimental values reported in the literature.
- Published
- 2022
10. Lane flow distribution on a three-lane freeway: General features and the effects of traffic controls
- Author
-
Duret, Aurélien, Ahn, Soyoung, and Buisson, Christine
- Published
- 2012
- Full Text
- View/download PDF
11. From heterogeneous drivers to macroscopic patterns in congestion
- Author
-
Chiabaut, Nicolas, Leclercq, Ludovic, and Buisson, Christine
- Published
- 2010
- Full Text
- View/download PDF
12. Impact of Variability of Car-Following Parameters on Road Capacity: The Simple Case of Newell’s Model
- Author
-
Gomez Patiño, Carlos Mario, Buisson, Christine, and Keyvan-Ekbatani, Mehdi
- Abstract
This paper contributes to the vehicle-level analysis of two macroscopic features of the road traffic: capacity variability and capacity drop. This paper focuses only on car-following (CF) behavior and leaves the part related to lane-change maneuvers for future research. In particular, a simplistic CF model (Newell’s with bounded acceleration) for a single-lane scenario is studied. In this work, by introducing a speed limitation across a zone, a bottleneck with variable nominal capacity has been created. A continuous event-based numerical resolution method is used. Consequently, it is possible to vary the three Newell’s model parameters: maximal acceleration, minimal distance, and reaction time. It has been shown that the variability of those CF parameters (e.g., reaction time, minimal distance, and maximal acceleration) has a strong impact on pre-breakdown capacity variation and also on queue discharge flow. It has been concluded that this parameters variability does affect the drop (provided that the maximal acceleration has a relatively high mean value). Various distribution shapes (uniform, truncated Gaussian, and Gamma) have been explored. It has been realized that this does not have any significant impact on the capacity distribution. Concerning the amplitude of the capacity distribution, it is demonstrated that reaction time is the parameter with the highest impact followed by minimal distance. If all parameters vary with an amplitude of 30%, it is shown that the capacity standard deviation, in this scenario without lane changes, is about half the experimental values reported in the literature.
- Published
- 2023
- Full Text
- View/download PDF
13. Data processing and enhancement techniques
- Author
-
Hoogendoorn, Serge, primary, Antoniou, Constantinos, additional, Schreiter, Thomas, additional, Yuan, Yufei, additional, Barcelo, Jaume, additional, Buisson, Christine, additional, Punzo, Vincenzo, additional, and van Lint, Hans, additional
- Published
- 2014
- Full Text
- View/download PDF
14. Calibration and validation principles
- Author
-
Buisson, Christine, primary, Daamen, Winnie, additional, Punzo, Vincenzo, additional, Wagner, Peter, additional, Montanino, Marcello, additional, and Ciuffo, Biagio, additional
- Published
- 2014
- Full Text
- View/download PDF
15. Introduction
- Author
-
Daamen, Winnie, primary, Buisson, Christine, additional, and Hoogendoorn, Serge, additional
- Published
- 2014
- Full Text
- View/download PDF
16. Observation of vehicular response time in CACC platooning experiments
- Author
-
Lanaud, Elsa, Ladino, Andres, Buisson, Christine, École Nationale des Travaux Publics de l'État (ENTPE), École Nationale des Travaux Publics de l'État (ENTPE)-Ministère de l'Ecologie, du Développement Durable, des Transports et du Logement, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE ), École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon-Université Gustave Eiffel, and Cadic, Ifsttar
- Subjects
TRAITEMENT DES DONNEES ,DISTANCE INTERVEHICULAIRE ,VITESSE ,[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation ,SYSTEME DE TRANSPORT INTELLIGENT ,CONDUITE AUTOMATISEE ,AUTOMATED CAR-FOLLOWING ,SYSTEME INTELLIGENT ,CACC ,SIMULATION ,TRAFIC ROUTIER ,VEHICULE AUTONOME ,[INFO.INFO-MO] Computer Science [cs]/Modeling and Simulation ,RESPONSE TIME ,CIRCULATION EN PELOTON ,AIDE A LA CONDUITE ,REGULATION DU TRAFIC - Abstract
4th webinar Ectri Traffic Management Thematic Group, Bron, FRANCE, 08-/10/2020 - 08/10/2020; We realized an analysis of the CACC data of the Volpe laboratory. We observe that the response times distributions are spreading when the distance to the leader and the position in the platoon increase. This leads us to question the connectivity inside those platoons.
- Published
- 2020
17. Evaluation de la régulation de cinq accès de la rocade de Grenoble
- Author
-
Aliaga, Frédéric, BUISSON, Christine, Mansuy, Philippe, Coutard, Philippe, Creusel, Valentine, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon, Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Direction Régionale de l'Environnement, de l'Aménagement et du Logement - Grand Est (DREAL Grand Est), Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Buisson, Christine
- Subjects
[SPI.GCIV]Engineering Sciences [physics]/Civil Engineering ,[SPI.GCIV] Engineering Sciences [physics]/Civil Engineering ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2019
18. First Observations about Response Times and Connectivity in a Vehicles Platooning Experiment
- Author
-
Lanaud, Elsa, primary, Ladino, Andres, additional, and Buisson, Christine, additional
- Published
- 2021
- Full Text
- View/download PDF
19. Zero crashes, zero congestion, and zero emissions - Future Research in Traffic Management
- Author
-
Almeras, Caroline, Buisson, Christine, Olstam, Johan, Papamichail, Ioannis, Ponweiser, Wolfgang, and Wagner, Peter
- Subjects
Transportteknik och logistik ,Zero Congestion ,Traffic Management ,Zero Crashes ,Transport Systems and Logistics ,Zero Emissions - Abstract
This text is the result of the Thematic Group Traffic Management of the ECTRI – European Conference of Transport Research Institutes. As a position paper, it states the challenges that the European Research Agenda will have to face if the following goals for a future transportation system are considered: • User-aware mobility • Zero accidents and zero emissions • Minimum space, time, energy & costs for transport It describes in a concise manner the research approaches needed to achieve the realization of these goals.
- Published
- 2020
20. Comment estimer la durée d'arrêt des trains en gare en zone dense ? Les données de comptage automatique ouvrent de nouvelles perspectives
- Author
-
CORNET, Selim, BUISSON, Christine, Ramond, François, Rodriguez, Joaquin, Évaluation des Systèmes de Transports Automatisés et de leur Sécurité (COSYS-ESTAS ), Université de Lille-Université Gustave Eiffel, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE ), École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon-Université Gustave Eiffel, and SNCF Innovation & Recherche
- Subjects
TRAITEMENT DES DONNEES ,OPTIMISATION DES HORAIRES DES TRAINS ,OPTIMISATION ,HEURISTIQUE ,DUREE DE STATIONNEMENT DES TRAINS ,[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] ,TRAIN ,MODELISATION ,STATIONNEMENT ,TABLE HORAIRE - Abstract
Les temps de stationnement en gare en Île-de-France peuvent avoir un impact significatif sur la régularité des trains transilien. L'optimisation des durées de stationnement est essentielle pour une exploitation efficace, en n'étant ni trop courtes, ni trop longues. Le déploiement d'un système de comptage automatique des voyageurs embarqué permet de comprendre les déterminants d'une telle durée optimale. Il en résulte une modélisation du temps de stationnement minimal, effectuée par gare et par sens, qui permet d'évaluer la probabilité que les temps de stationnement prévus dans la grille horaire soient respectés ou soient source de retards.
- Published
- 2020
21. MESures et SImulation pour une GEstion Optimisée des systèmes de transports
- Author
-
Buisson, Christine, Badin, Anne-Laure, Bousquet, Aurélie, DITCHI, Nicolas, DURET, Aurélien, HANS, Etienne, Lasserre, Virginie, Lecointre, Wilhemine, LEJRI, Delphine, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon, Département Composants et Systèmes (IFSTTAR/COSYS), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université de Lyon-PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Lille Nord de France, Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement (Cerema), and Ifsttar, Cerema
- Subjects
[SPI.GCIV.IT]Engineering Sciences [physics]/Civil Engineering/Infrastructures de transport - Abstract
The stakes that were targeted by this collaboration are linked to the rarefaction of resources used to build new transportation infrastructures and to the higher attention paid to the environmental impacts of mobilities. Indeed, transportation network managers have a real need for tools and methods to master the increase of movement demand while reducing the impacts of these moves. On these topics, the research done in the Ifsttar allied to the expertise of the Cerema gave birth to a form of integrative research that contributed to broaden the horizons of both partners. The main results of this collaboration are presented in this final report. They comprise: •Better understanding of flows propagation inside the transportation system;•Quantification tools for assessing the impacts of this flow in terms of travel time and accessibility as well as pollutants levels;•Offer of new simulation and modelling tools, that can be used in more situations; (because their calculation time is smaller and they include the effects of regulations);•Strengthening of the methodologies to assess the regulation of suburban motorways. In addition to the presentation of those results, the report includes a list of the productions of the collaboration, the most significant productions, the presentations made during the final seminar and directions for future research.; Les enjeux que cette collaboration a permis de traiter sont liés à la raréfaction des ressources permettant de construire des nouvelles infrastructures de transports et à la montée de la prise en compte des impacts environnementaux des mobilités. Ceci génère un réel besoin, de la part des gestionnaires de réseaux de transports, d’outils et de méthodes leur permettant de maîtriser la croissance de la demande de déplacements tout en diminuant les impacts de ces déplacements. Sur ces sujets, l’articulation des recherches conduites à l’IFSTTAR et de l’expertise que possède le CEREMA a donné lieu à une recherche intégrative qui a contribué à élargir les horizons de chacun des deux partenaires. Les principaux résultats de Messigéo, présentés dans ce rapport final, concernent : •Amélioration de la compréhension de la propagation des flux dans le système de transport ;•Quantification des impacts du fonctionnement du système de transports en termes de temps de parcours et d’accessibilité, tout comme sur les niveaux de polluants ;•Proposition de nouveaux outils de modélisation et de simulation, utilisables dans plus de cas (car ils sont de temps de calcul faible et qu’ils intègrent les effets des régulations) ;•Consolidation des méthodologies d’évaluation des régulations des autoroutes périurbaines.Outre une synthèse de ces résultats, ce rapport contient également la liste des publications, les productions les plus significatives, les présentations faites au cours du séminaire de restitution, et des pistes de recherche future.
- Published
- 2019
22. A framework to assess the feasibility of safe lane changes towards special purpose lanes
- Author
-
Buisson, Christine, primary, Riou, Remi, additional, and Ancelet, Olivier, additional
- Published
- 2020
- Full Text
- View/download PDF
23. Assessing train timetable efficiency in a Mass Transit context using a data-based simulation method
- Author
-
Cornet, Selim, primary, Buisson, Christine, additional, Ramond, Francois, additional, Bouvarel, Paul, additional, and Rodriguez, Joaquin, additional
- Published
- 2020
- Full Text
- View/download PDF
24. Ce que la data change à l'exploitation routière
- Author
-
Buisson, Christine, Creusel, Valentine, Charansonney, Luc, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Direction Régionale de l'Environnement, de l'Aménagement et du Logement - Grand Est (DREAL Grand Est), Ville de Paris, Laboratoire Ville, Mobilité, Transport (LVMT ), École des Ponts ParisTech (ENPC)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université Paris-Est Marne-la-Vallée (UPEM), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon, and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université Paris-Est Marne-la-Vallée (UPEM)-École des Ponts ParisTech (ENPC)
- Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other - Abstract
International audience; L'émergence de nouveaux modes de collecte de données sur les déplacements est une des conséquences de la massification des "smart phones". Ceci crée une nouvelle chaîne de production d'information routière. Sa collecte et sa diffusion gratuite à l'usager assurées historiquement par l'exploitant cohabitent maintenant avec une information devenue un produit d'appel. Un produit comme un autre ?
- Published
- 2019
25. Maryland Aerial Survey of Highway Traffic Between Baltimore and Washington Arthur N. Johnson (1870-1940)
- Author
-
Charansonney, Luc, BUISSON, Christine, Ville de Paris, Laboratoire Ville, Mobilité, Transport (LVMT ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université Paris-Est Marne-la-Vallée (UPEM)-École des Ponts ParisTech (ENPC), Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon, Traffic Flow Theory and Characteristcs Committee, École des Ponts ParisTech (ENPC)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université Paris-Est Marne-la-Vallée (UPEM), and Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
- Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other ,[SPI.GCIV.IT]Engineering Sciences [physics]/Civil Engineering/Infrastructures de transport - Abstract
Présenté par Christine Buisson lors de la conférence; International audience
- Published
- 2018
26. Is transportation congestion an endless plague? From current traffic observations to a future automated shuttle service. Keynote given at CERAI 29-30 August 2018
- Author
-
Buisson, Christine
- Published
- 2018
- Full Text
- View/download PDF
27. Impede Autonomous Vehicles Merging at On-Ramps?
- Author
-
Buisson, Christine, Keyvan-Ekbatani, Mehdi, Wagner, Peter, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon, University of Canterbury, DLR Institute of Transportation Systems, and German Aerospace Center (DLR)
- Subjects
MICROSCOPIC SIMULATION ,LYON ,MODELE MACROSCOPIQUE ,AUTOROUTE ,TRAFFIC CONTROL ,CIRCULATION ROUTIERE ,ETALONNAGE ,MODELISATION ,[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation ,CONNECTED AND AUTOMATED VEHICLES ,MODELE MICROSCOPIQUE ,GESTION DU TRAFIC ,effect on capacity ,RAMP METERING ,CONDUITE AUTOMATISEE ,SIMULATION ,ramp-metering ,autonomous vehicles ,REGULATION DU TRAFIC ,VEHICULE CONNECTE - Abstract
TRB 2018, 97th Annual Meeting Transportation Research Board, Washington, ETATS-UNIS, 07-/01/2018 - 11/01/2018; This paper sheds some light on the macroscopic and microscopic characteristic of traffic flow on freeways in the merging areas in presence of Human-Driven Vehicles (HDV) and Connected Autonomous Vehicle (CAV) by thoroughly digging into the literature, exploiting real data and simulating simple scenarios. In particular, in the first step, an extensive literature review on merging behaviour for current and future traffic conditions (i.e. having HDV or HDV and/or CAV on the road) has been carried out. This is followed by an analysis of single vehicle data from a freeway in Lyon to illustrate current speed and headway distributions which are most likely to change with the introduction of CAV's. Finally, some microscopic simulation results are presented which show that traffic flow typically gains from the introduction of CAV's, but may also display negative consequences under certain circumstances. This simulation study focused mainly on the traffic characteristics at the merging area in presence of CAV. It remains for future work to map out precisely where the introduction of CAV's improves the traffic system, and where amendments have to be made to prevent negative side-effects. It should be noted that calibrating and validating the micro-simulation tools which simulate traffic scenarios in presence of CAV's will indeed be challenging in the future. This needs extra attention for research.
- Published
- 2018
28. Identification and quantification of particulate tracers of exhaust and non-exhaust vehicle emissions
- Author
-
Charron, Aurélie, primary, Polo-Rehn, Lucie, additional, Besombes, Jean-Luc, additional, Golly, Benjamin, additional, Buisson, Christine, additional, Chanut, Hervé, additional, Marchand, Nicolas, additional, Guillaud, Géraldine, additional, and Jaffrezo, Jean-Luc, additional
- Published
- 2019
- Full Text
- View/download PDF
29. Supplementary material to "Identification and quantification of particulate tracers of exhaust and non-exhaust vehicle emissions"
- Author
-
Charron, Aurélie, primary, Polo-Rehn, Lucie, additional, Besombes, Jean-Luc, additional, Golly, Benjamin, additional, Buisson, Christine, additional, Chanut, Hervé, additional, Marchand, Nicolas, additional, Guillaud, Géraldine, additional, and Jaffrezo, Jean-Luc, additional
- Published
- 2018
- Full Text
- View/download PDF
30. Identification and quantification of particulate tracers of exhaust and non-exhaust vehicle emissions
- Author
-
Charron, Aurélie, primary, Polo-Rehn, Lucie, additional, Besombes, Jean-Luc, additional, Golly, Benjamin, additional, Buisson, Christine, additional, Chanut, Hervé, additional, Marchand, Nicolas, additional, Guillaud, Géraldine, additional, and Jaffrezo, Jean-Luc, additional
- Published
- 2018
- Full Text
- View/download PDF
31. Fuel Consumption of Adaptive Cruise Control Platoons: Bench Experiments and Data-Driven Estimation for Real Traffic
- Author
-
Charlottin, Thibault, Varotto, Silvia, Jeanneret, Bruno, Gillet, Sylvain, and Buisson, Christine
- Abstract
Vehicles equipped with adaptive cruise control (ACC) systems are expected to improve traffic safety and decrease fuel consumption. Recent experimental studies have shown that ACC leads to string instability in the case of platooning and can, therefore, result in higher energy needs compared with a platoon of human-driven vehicles (HDV). However, the impact of ACC on fuel consumption in the case of platooning and the global impact of ACC fuel overconsumption in traffic are not known yet. This study examines the impact of ACC systems on traffic fuel consumption using experimental data and traffic records. In this study, we inject the speed profiles of ACC and HDV platoons that follow a similar leader trajectory into an engine bench. Then, we identify the event that leads to an overconsumption of fuel in the case of platooning. The results of the engine bench show that only ACC platoons of six or more vehicles with a short time-gap setting consume more fuel than HDV platoons. Using HighD and ExiD records, we detect if the events leading to fuel overconsumption often happen in traffic. The results on HighD and ExiD show that such an event happens once out of 1,250 episodes if we divide the time into episodes of 15 s. This shows that, even if fuel overconsumption exists in specific cases, those cases are actually too rare in traffic to affect global fuel consumption.
- Published
- 2024
- Full Text
- View/download PDF
32. Challenges in Applying Calibration Methods to Traffic Models
- Author
-
Wagner, Peter, Buisson, Christine, Nippold, Ronald, German aerospace Center, Institute of transportation systems, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), and Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
- Subjects
CALIBRATION ,[SPI.OTHER]Engineering Sciences [physics]/Other ,stochasticity ,INGENIERIE DU TRAFIC ,Verkehrssimulation und -prognose ,ETALONNAGE ,Verkehrsmanagement ,CAR-FOLLOWING MODELS ,micro-simulation ,MICRO SIMULATION ,calibration of traffic flow models ,TRAFIC ,SIMULATION ,TRAJECTORY DATA - Abstract
TRB 2016, Transportation Research Board 95th annual meeting, WASHINGTON D.C, ETATS-UNIS, 10-/01/2016 - 14/01/2016; This text looks at calibration and validation as a means to understand traffic flow models better. It concentrates on the car-following part of it and demonstrates that the calibration of stochastic models under certain circumstances can become very difficult. Three types of stochasticity are distinguished for microscopic traffic flow models: the one coming from noisy data, the one coming from the distribution of the parameters describing the driver's behavior and the one coming from the model itself, when a noise component is added to a deterministic differential equation governing the vehicle's movements. By using four sub models comprising four different noise terms and an identical deterministic part this text shows that a calibration with synthetic - and therefore reproducible - data can lead to awry results. Parameters fitted by the calibration procedure are significantly different for deterministic and stochastic models. The text makes the conclusion that the stochasticity is the reason why the parameter estimation of stochastic models fails sometimes. Up to now, the authors were, unfortunately, not able to propose a solution to cope with this intrinsic pitfall of genuine stochastic models.
- Published
- 2016
33. Quantifying the Number of Lane Changes in Traffic An empirical analysis
- Author
-
KNOOP, Victor L., HOOGENDOORN, Serge P., SHIOMI, Y, BUISSON, Christine, Delft University of Technology (TU Delft), Kyoto University Katsura nishikyo-ku, Department of urban management, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon, Cadic, Ifsttar, and Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
- Subjects
TRANSIT (TRAFIC) ,[SPI.OTHER]Engineering Sciences [physics]/Other ,TRAFFIC FLOW ,[SPI.OTHER] Engineering Sciences [physics]/Other ,LANE CHANGING ,TRAFIC ,CIRCULATION ,VOIE DE CIRCULATION ,MEASUREMENT - Abstract
TRB 2016, Transportation Research Board 95th annual meeting, WASHINGTON D.C, ETATS-UNIS, 10-/01/2016 - 14/01/2016; Lane changes are an important aspect of freeway flow. Most lane change models are microscopic, describing whether individual vehicles/drives will change lanes, and hence are calibrated microscopically. Macroscopic validation often is restricted to the distribution of vehicles across lanes. To the best of our knowledge, no systematic analysis has been made of the number of lane changes as function of the operational characteristics of the origin and target lane. This paper fills that gap, by analyzing the number of lane changes as function of several incentives. Based on data availability, two 'simple' sites are selected, i.e. as close as possible to a straight continuous freeway. Statistically, we find that on the selected sites, drivers change lanes on average once per two kilometer driven. Furthermore, analyzing the number of lane changes (per kilometer per hour) as function of the density in the origin lane and in the target lane, we find, as expected, this increases with the density in the origin lane for a fixed density in the target lane. Surprisingly, it also increases with the density in the target lane for a fixed density in the origin lane. The underlying mechanism is therefore different than gap acceptance theory. The analyses presented in this paper can be used to qualitatively verify (microscopic and macroscopic) lane change models, and to propose better lane change models.
- Published
- 2016
34. Using Polar Coordinates to Filter Trajectories Data without Adding Extra Physical Constraints
- Author
-
BUISSON, Christine, VILLEGAS, Daniel, RIVOIRARD, Lucas, Cadic, Ifsttar, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Laboratoire Électronique Ondes et Signaux pour les Transports (IFSTTAR/COSYS/LEOST), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Lille Nord de France
- Subjects
TRAFFIC FLOW ,FILTERING ,[INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering ,INGENIERIE DU TRAFIC ,TRAJECTOIRE ,VOIE DE CIRCULATION ,TRAJECTORIES ,SPACE TRAVELLED ,CIRCULATION ROUTIERE ,[INFO.INFO-AU] Computer Science [cs]/Automatic Control Engineering ,POLAR COORDINATES - Abstract
TRB 2016, Transportation Research Board 95th annual meeting, WASHINGTON D.C, ETATS-UNIS, 10-/01/2016 - 14/01/2016; Filtering methods for the position or the speed measurements of the NGSim trajectories dataset are numerous, but specific to the noise resulting of NGSim data collection and processing. The MOCoPo (Measuring and mOdelling COngestion and POllution) collaboration collected more than 10 hours of data with a high resolution camera mounted underneath a helicopter flying almost immobile above a freeway in Grenoble. Along with the post-treatment method, this generates a noise in the position measurement of the center of gravity of the image associated with the vehicle. We present a method classically based on polynomial fitting but where the originality states in using the polar coordinates instead of the Cartesian ones as is usually done. Indeed the radial coordinate capture most of the physics of the act of driving a car: selecting a speed, whereas the polar angle is much more related to the geometry of the road. The method fits the space travelled whose derivative is the real instantaneous speed. This method is developed in two versions: piece-wise constant accelerations or piece-wise linear accelerations. In both cases the root mean square error of the position measurements is of less than 0.4 m. The main advantage of this method is that it provides values of acceleration fully compatible with the physical limits found in the literature, without adding extra constraint.
- Published
- 2016
35. A Macroscopic Model for Freeway Weaving Sections
- Author
-
MARCZAK, Florian, Leclercq, Ludovic, BUISSON, Christine, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), and Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
- Subjects
[SPI.GCIV]Engineering Sciences [physics]/Civil Engineering ,CAPACITY DROP ,CAPACITE DES ROUTES ,WEAVING SECTION ,TRAFIC ,CARREFOUR ,ZONE URBAINE ,TRAFFIC MODELING ,MODELISATION ,CAPACITE (ROUTE) - Abstract
The objective of this paper is to propose an analytical traffic model adapted to freeway weaving sections. To this aim, a theoretical weaving section is considered at the macroscopic level as the superposition of two merges and two diverges. The model endogenously incorporates the capacity drop related to the weaving lane changes. It only depends on six parameters: three parameters of the fundamental diagram (the free-flow speed, the jam density and the wave speed in congestion), the vehicles' acceleration, the relaxation factor and the length of the anticipation zone. A sensitivity analysis proves that the acceleration rate and the relaxation parameter most influence the capacity drop. The analytical model agrees well with microsimulation results and empirical data collected on a weaving section in France.
- Published
- 2015
36. Identification and quantification of particulate tracers of exhaust and non-exhaust vehicle emissions.
- Author
-
Charron, Aurélie, Polo-Rehn, Lucie, Besombes, Jean-Luc, Golly, Benjamin, Buisson, Christine, Chanut, Hervé, Marchand, Nicolas, Guillaud, Géraldine, and Jaffrezo, Jean-Luc
- Abstract
In order to identify and quantify key-species associated with non-exhaust emissions and exhaust vehicular emissions a large comprehensive dataset of particulate species has been obtained thanks to simultaneous near-road and urban background measurements coupled with detailed traffic counts and chassis dynamometer measurements of exhaust emissions of a few in-use vehicles well-represented in the French fleet. Elemental Carbon, brake-wear metals (Cu, Fe, Sb, Sn, Mn), n-alkanes (C19-C26), light molecular weight PAHs (Pyrene, Fluoranthene, Anthracene) and two hopanes (17α21βNorhopane and 17α21βhopane) are strongly associated with the road traffic. Traffic-fleet emission factors have been determined for all of them and are consistent with most recent published equivalent data. When possible, light-duty and heavy-duty duty traffic emission factors are also determined. Most of the first ones are in good agreement with emissions from chassis dynamometer measurements in absence of significant non-combustion emissions. This study has shown that ratios involving copper (mainly Cu/Fe and Cu/Sn) could be used to trace brake-wear emissions as they seem to be roughly constant in Europe and as longer as Cu-free brake are not largely spread. In France where the traffic was largely dominated by diesel vehicles in 2011 (70 %), the OC/EC ratio typical of traffic emissions was around 0.44. On the contrary, the use of quantitative data for source apportionment studies is not straightforward for the identified organic molecular markers; while, their presence seems to well-characterized fresh traffic emissions. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
37. Real-World Road-Traffic and Fleet Data, Congestion and Pollutant Emissions
- Author
-
Pasquier, Anaïs, Andre, Michel, Liu, Yao, Carteret, Marion, Buisson, Christine, Laboratoire Transports et Environnement (IFSTTAR/AME/LTE), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Université de Lyon, Laboratoire de Chimie Moléculaire et Environnement (LCME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), J11-09, MOCOPO - MEEDDM-CGDD, and Cadic, Ifsttar
- Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other ,VEHICULE ,VEHICLE ,OBSERVATION IN SITU ,[SPI.OTHER] Engineering Sciences [physics]/Other ,FLEET ,TRAFFIC ,MODELISATION ,COMPOSITION DU TRAFIC ,[SDE.ES]Environmental Sciences/Environmental and Society ,EMISSION MODELLING ,POLLUTANT ,IN SITU ,SURVEILLANCE ,TRAFIC ,POLLUTION ATMOSPHERIQUE ,POLLUANT ,[SDE.ES] Environmental Sciences/Environmental and Society ,MONITORING ,FLOTTE ,EMISSION ,VIDEO - Abstract
TAP 2014, 20th Internationa conference on Transport and Air Pollution, GRAZ, AUTRICHE, 18-/09/2014 - 19/09/2014; Within the framework of MOCoPo research project, an in-situ experiment was conducted during one- month in Grenoble, France (400,000 inhabitants) on a high-capacity road (ring, 2x2 lanes) close to an area of exchanges and frequently under congested conditions. Traffic counting was performed at 6- minutes intervals. Four video-cameras were installed to capture in real-time vehicle license plates. Their identification through the national registrations enabled the characterization of the fleet composition. These data were used to simulate pollutant emissions from the traffic, by the COPCETE calculation plate-form. Based on the COPERT4 (V9) methodology, it enables the computation of around 7000 observations (i.e. two full weeks of valid 6-minutes data), integrated on a distance of 1 km, and described by the real-world traffic data (flow, speed) and fleet composition as observed by the video. These works have first enabled the implementation of the video technique to capture the in- situ fleet composition. 1.7 million of observations and 350,000 French registrations allowed a good and detailed characterization of the local fleet, its specificities and variability with the time-periods. Analyses of pollutant emissions demonstrate that they are mainly linked to the traffic flows, thus to the fleet composition (heavy vehicle share) and then to the traffic conditions. Complementary analyses demonstrate the importance of cold start over-emission.
- Published
- 2014
38. Analyzing railroad congestion in a dense urban network through the use of road traffic network fundamental diagram concept
- Author
-
Cuniasse, Pierre-Antoine, Buisson, Christine, Rodriguez, Joaquin, Teboul, Emmanuel, de Almeida, David, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Évaluation des Systèmes de Transports Automatisés et de leur Sécurité (IFSTTAR/COSYS/ESTAS), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Lille Nord de France, SNCF, and Cadic, Ifsttar
- Subjects
RAILRAOD TRAFFIC ,TRANSIT (TRAFIC) ,[SPI.OTHER]Engineering Sciences [physics]/Other ,TRANSPORT FERROVIAIRE ,[SPI.OTHER] Engineering Sciences [physics]/Other ,MACROSCOPIC FUNDAMENTAL DIAGRAM ,TRAIN (CHEMIN DE FER) ,TRAFIC - Abstract
TRB 2014 - Transportation Research Board 93rd Annual Meeting, WASHINGTON D.C, ETATS-UNIS, 12-/01/2014 - 16/01/2014; Transilien, the branch of SNCF in charge of operating the main urban railroad network in the area of Paris, faces a regular increase of passengers flows. The planning of railway operations is made carefully: simulation runs permit to assess the timetable stability. However, many disturbance 5 appears and cause trains delays. Due to the nature of the railroad network those delays are cumulative and an on-line update of the timetable is not always successful in maintaining the trains schedule. In this tensed context, operators are searching solutions to better use the infrastructure capacity and better service quality. A needed step towards this objective is a better understanding of the phenomena of disruptions. In particular because the expansion of congestion is not clearly 10 understood until now. This paper explores the possibility to transpose a traffic flow theory tool, the network fundamental diagram, in the field of dense railroad traffic. Railroad traffic is different of road traffic by many ways: railways are a planned system, traffic volume does not satisfy the continuum hypothesis, stations force stops and the signalization system brings a discrete behavior. Despite those big differences we show how to build a network fundamental diagram for a railroad 15 system and how to interpret some obtained shapes for those diagrams. These diagrams gives us some means to compare planned and reality. We also identify the limits that need to be overcome to take benefits of the road traffic tools in railroad traffic analysis.
- Published
- 2014
39. Calibration, estimation and sampling issues of 2 car-following parameters
- Author
-
MONTEIL, Julien, Billot, Romain, Sau, Jacques, BUISSON, Christine, EL FAOUZI, Nour Eddin, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), and Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
- Subjects
CALIBRATION ,[SPI.OTHER]Engineering Sciences [physics]/Other ,STATISTICAL TECHNICS ,EXPERIENCE (HOMME) ,SIMULATION ,COMPORTEMENT DU CONDUCTEUR ,COMPORTEMENT ,ETALONNAGE ,CAR-FOLLOWING MODELS - Abstract
Drivers behave in different ways, and these different behaviors are a cause of traffic disturbances. A key objective for simulation tools is to correctly reproduce this variability, in particular for car-following models. From data collection to the sampling of realistic behaviors, a chain of key issues must be addressed. This paper discusses data filtering, robustness of calibration, correlation between parameters, and sampling techniques of acceleration-time continuous car-following models. The robustness of calibration is systematically investigated with an objective function that allows confidence regions around the minimum to be obtained. Then, the correlation between sets of calibrated parameters and the validity of the joint distributions sampling techniques are discussed. This paper confirms the need for adapted calibration and sampling techniques to obtain realistic sets of car-following parameters, which can be used later for simulation purposes.
- Published
- 2014
40. Fundamentals of Traffic Simulation Jaume Barceló
- Author
-
Buisson, Christine
- Published
- 2012
- Full Text
- View/download PDF
41. Empirical Analysis of Lane Changing Behavior at a Freeway Weaving Section
- Author
-
Marczak, Florian, primary, Daamen, Winnie, additional, and Buisson, Christine, additional
- Published
- 2016
- Full Text
- View/download PDF
42. Challenges in Applying Calibration Methods to Stochastic Traffic Models
- Author
-
Wagner, Peter, primary, Buisson, Christine, additional, and Nippold, Ronald, additional
- Published
- 2016
- Full Text
- View/download PDF
43. Barcelo, Jaume, ed. 2010. Fundamentals of Traffic Simulation
- Author
-
Buisson, Christine
- Subjects
Fundamentals of Traffic Simulation (Nonfiction work) -- Barcelo, Jaume -- Book reviews ,Books -- Book reviews ,Business, general ,Business - Abstract
BARCELO, JAUME, ED. 2010. Fundamentals of Traffic Simulation. Springer, New York. 492 pp. $189.00. Fundamentals of Traffic Simulation presents the state of the art in traffic simulation in a useful [...]
- Published
- 2012
- Full Text
- View/download PDF
44. Use, Calibration, and Validation of Traffic Simulation Models in Practice: Results of Web-Based Survey
- Author
-
Brackstone, Mark, Montanino, Marcello, Daamen, Winnie, Buisson, Christine, Punzo, Vicenzo, IOMI Consulting, parent, Department Of transportation engineering, Universita di Napoli Frederico II, Departement of transport and planning, Deft university of technology, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), JRC Institute for Energy and Transport (IET), European Commission - Joint Research Centre [Petten], and Cadic, Ifsttar
- Subjects
CALIBRATION ,[SPI.OTHER]Engineering Sciences [physics]/Other ,[SPI.OTHER] Engineering Sciences [physics]/Other ,INGENIERIE DU TRAFIC ,STATISTIQUE ,STATISTICAL ANALYSIS ,INFORMATION RETRIEVAL ,VALIDATION ,TRAFIC ,SIMULATION ,TRAFFIC MODELS ,WEBSITES ,SURVEYS ,MICROSIMULATION ,TRAFFIC SIMULATION - Abstract
TRB 2012 - Transportation Research Board 91rd Annual Meeting, WASHINGTON D.C, ETATS-UNIS, 22-/01/2012 - 26/01/2012; This paper reports on the results of a web based survey conducted as part of the MULTITUDE project (Methods and tools for supporting the Use caLibration and validaTIon of Traffic simUlation moDEls). The project, being performed in Europe, is attempting to focus and drive forward the issue of 'model validity' and thereby calibration and validation methods and their usage in simulation. As part of this, an assessment of the state-of-the-practice has been performed, examining among other things how models are applied what procedures are used for calibration and what guidelines are followed. The basis for this state-of-the-practice, is a web based survey which ran in the latter quarter of 2010 and obtained 215 responses. The paper details the finding of this survey which, while lengthy, substantiates two clear messages. Firstly, that Calibration, Validation and Sensitivity analysis although now more widespread than was previously thought, are still far from being required procedure, and secondly that while guidelines are increasingly in use, governing for example number of simulation runs, there are still many regions where this does not occur and indeed there is still much reliance on personal experience and habit, especially in situations where network characteristics become large. The results of the survey underpin the need for further focus on the use of models and procedures for calibration and validation, and indicate, more specifically, the areas that MULTITUDE will focus on in the near future.
- Published
- 2012
45. Use, Calibration and Validation of Traffic Simulation Models in Practice: Results of a Web based Survey
- Author
-
BRACKSTONE Mark, MONTANINO Marcello, DAAMEN Winnie, BUISSON Christine, and PUNZO VINCENZO
- Abstract
This paper reports on the results of a web based survey conducted as part of the MULTITUDE project (Methods and tools for supporting the Use caLibration and validaTIon of Traffic simUlation moDEls). The project, being performed in Europe, is attempting to focus and drive forward the issue of 'model validity' and thereby calibration and validation methods and their usage in simulation. As part of this, an assessment of the state-of-the-practice has been performed, examining among other things how models are applied what procedures are used for calibration and what guidelines are followed. The basis for this state-of-the-practice, is a web based survey which ran in the latter quarter of 2010 and obtained 215 responses. The paper details the finding of this survey which, while lengthy, substantiates two clear messages. Firstly, that Calibration, Validation and Sensitivity analysis although now more widespread than was previously thought, are still far from being required procedure, and secondly that while guidelines are increasingly in use, governing for example number of simulation runs, there are still many regions where this does not occur and indeed there is still much reliance on personal experience and habit, especially in situations where network characteristics become large. The results of the survey underpin the need for further focus on the use of models and procedures for calibration and validation, and indicate, more specifically, the areas that MULTITUDE will focus on in the near future., JRC.F.8-Sustainable Transport
- Published
- 2012
46. Comprendre le trafic routier. Méthodes et calculs
- Author
-
Buisson, Christine, Lesort, Jb, and Cadic, Ifsttar
- Subjects
MODELE MATHEMATIQUE ,DENSITE ,DEBIT DE VEHICULE ,AFFECTATION DU TRAFIC ,VITESSE ,[SPI.OTHER] Engineering Sciences [physics]/Other ,TRAFIC ROUTIER ,TEMPS DE PARCOURS ,CIRCULATION ,METHODE ,ECOULEMENT ,MODELISATION - Abstract
The high level of traffic demand, the significant number of players involved and the close-knit relationships between road networks make road traffic a complex area to study. Network congestion is an increasingly common phenomenon that is directly perceived by the general public, insofar as many users have personal experience of it. This explains why traffic theoreticians have been trying to gain a better, quantified understanding of the mechanisms in operation for the past 50 years or so. This publication aims to provide an accessible review of the subject at this point. Firstly, it sets out the different variables used to characterise the progress of vehicles along a thoroughfare, and secondly the fundamental relationships between some of these variables. By way of illustration, this is followed by a number of simple calculations for estimating the time taken to get through a traffic jam. The next section looks at the concepts of cumulative flows and journey times, whilst the last chapter deals with the problem of interconnected networks and calculations relating to spatio-temporal changes in congestion. Finally, there are a number of appendices, with a series of exercises and suggested answers, a French-English glossary and a bibliography. This publication is aimed primarily at professionals dealing with the problems of congestion, whether as operators of urban, suburban or interurban transport networks, or heading up research into the design of new infrastructure or improving the operation of existing infrastructure. It may also be of interest to undergraduate and Masters students, particularly those studying engineering., Le niveau éleÎ de la demande de trafic, le nombre important d'acteurs concernés, ainsi que le maillage des réseaux viaires, contribuent à faire du trafic routier un domaine d'études complexe. La congestion des réseaux est un phénomène de plus en plus courant, et directement perceptible par le grand public, car elle est subie par de nombreux usagers. C'est pourquoi, depuis une cinquantaine d'années, des théoriciens du trafic cherchent à mieux comprendre et à quantifier les mécanismes à l'oeuvre. Le présent ouvrage tente de faire le point, de manière accessible, sur le sujet. Il présente en premier lieu les différentes variables qui permettent de caractériser la progression des Îhicules sur une voie, puis la relation fondamentale qui permet de relier certaines de ces variables. À titre d'illustration, quelques calculs simples, permettant d'estimer le temps de traversée d'un bouchon, sont ensuite fournis. Les notions de débits cumulés et de temps de parcours sont ensuite abordées. La problématique des réseaux maillés, ainsi que les calculs d'évolution spatio-temporelle de la congestion terminent l'ouvrage, qui est par ailleurs complété par plusieurs annexes (série d'exercices avec leurs corrigés, glossaire français -anglais et bibliographie).
- Published
- 2010
47. Spatio-Temporal Analysis of Impacts of Lane Changing Consistent with Wave Propagation
- Author
-
DURET, Aurélien, AHN, Soyoung, BUISSON, Christine, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Department of Civil and Environmental Engineering [Tempe], Arizona State University [Tempe] (ASU), and Cadic, Ifsttar
- Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other ,TRAFFIC FLOW ,[SPI.OTHER] Engineering Sciences [physics]/Other ,LANE CHANGING ,TRAFIC ,TRAJECTOIRE ,VOIE DE CIRCULATION ,TRAJECTORY DATA ,COMPOSITION DU TRAFIC - Abstract
TRB 2009 - Transportation Research Board 88th Annual Meeting, WASHINGTON D.C, ETATS-UNIS, 08-/01/2009 - 11/01/2009; This paper is concerned with the impacts of lane-changing maneuvers in traffic streams. A new methodology is developed based on the simplified kinematic-wave theory and only requires one assumption: a constant speed of the backward-moving characteristic along a large platoon of vehicles. This method consists in quantifying the net impact of entering and exiting-lane changing maneuvers among a platoon of fifteen vehicles. It has been applied to two highway trajectory datasets from the NGSIM program. Findings from this study show that the impact of lane-changing depends on the net number of entering vehicles to a lane, and insertions have greater impacts in traffic stream than exits.
- Published
- 2009
48. New Insights on congested part of the FD calibration from Loop Detector Data
- Author
-
Chiabaut, Nicolas, BUISSON, Christine, Leclercq, Ludovic, Laboratoire d'ingénierie circulation transports (LICIT), Institut National de Recherche sur les Transports et leur Sécurité (INRETS)-École Nationale des Travaux Publics de l'État (ENTPE), and Cadic, Ifsttar
- Subjects
TRANSIT (TRAFIC) ,[SPI.OTHER]Engineering Sciences [physics]/Other ,[SPI.OTHER] Engineering Sciences [physics]/Other ,DETECTEUR ,CONGESTION (TRAFIC) ,TRAFIC ROUTIER ,CAPTEUR ,CONGESTION DU TRAFIC - Abstract
TFT Summer meeting Greenshields, Woods Hole, ETATS-UNIS, 08-/07/2008 - 10/08/2008; New Insights on congested part of the FD calibration from Loop Detector Data
- Published
- 2008
49. A Methodology and Measure of Performance for the Evaluation of Commuters Information Systems
- Author
-
BUISSON, Christine, LADIER, Cyril, Cadic, Ifsttar, Laboratoire d'Ingénierie Circulation Transport (LICIT UMR TE), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École Nationale des Travaux Publics de l'État (ENTPE)-Université de Lyon
- Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other ,ASSESSMENT ,[SPI.OTHER] Engineering Sciences [physics]/Other ,CONGESTION (TRAFIC) ,COMMUNICATION ,SYSTEME D'INFORMATION ,PANNEAU A MESSAGE VARIABLE - Abstract
The objective of this paper is to prove the effectiveness of variable message sign information on recurrent congestion using different measurements of effectiveness. To show the benefits of the information systems, we have built a new methodology. We took advantage of the data collected during a national strike which shut down the variable message signs. By comparing these data to a set of 'normal' days we can evaluate the impact of information systems on congestion level. We present a way to measure the effectiveness of information systems. For the evaluation of information effectiveness we use both qualitative and quantitative measurements. This allows us to finally give a financial assessment of information systems for commuters. Our study is based on an 80 km long suburban network in Lyon. We show that the benefits of an information system can be evaluated between 0.7 and 1 M per year (between 0.9 and 1.3 M US $ per year).
- Published
- 2007
50. Analytical Derivation of Capacity at Diverging Junctions
- Author
-
Marczak, Florian, primary and Buisson, Christine, additional
- Published
- 2014
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.