| 14h00 |
Markos Papageorgiou, Technical University of Crete, Greece. |
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A New Traffic Paradigm in the Era of Connected Automated Vehicles. |
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Abstract: The ERC Advanced Grant TrafficFluid (2019-2024) launches a novel paradigm for vehicular traffic in the era of connected and automated vehicles (CAVs), which is based on two combined principles. The first principle is lane-free traffic, which renders the driving task for CAVs smoother and safer, as risky lane-changing manoeuvres become obsolete; increases the capacity of the roadway due to increased road occupancy; and mitigates congestion-triggering vehicle manoeuvres. The second principle is vehicle nudging, whereby vehicles may be influencing other vehicles in front of them; this allows for traffic flow to be freed from the anisotropy restriction, which stems from the fact that human driving is influenced only by downstream vehicles; vehicle nudging is found to enhance macroscopic efficiency and stability of the emerging traffic flow.
Lane-free CAV traffic implies that incremental road widening (narrowing) leads to corresponding incremental increase (decrease) of capacity. This opens the way for real-time internal boundary control on highways and arterials to flexibly share the total (both directions) road width and capacity among the two directions in dependence of the bi-directional demand and traffic conditions, so as to maximize the total (two directions) flow efficiency.
The presentation concludes with the brief presentation of a conventional lane-free case study referring to the Place Charles de Gaulle roundabout in Paris. |
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| 14h45 |
Rodolphe Farrando, Université Gustave Eiffel/Cosys/Grettia & RATP. |
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The Effect of a Skip-stop Policy on The Train Frequency of a Mass Transit Line. |
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Abstarct: Implementing a skip-stop policy on a metro line brings benefits to both operators and passengers. In this paper, we develop an algebraic Max-plus model that quantitatively compares train frequency on a line operated with and without a skip-stop policy. The model analytically yields three distinct phases for train frequency: free flow, capacity, and congestion. In addition, we provide and interpret analytical formulas that reveal the impact of the number of trains parity on train frequency. These formulas also allow us to calculate the gains induced by this policy. These gains come from the increase in commercial speed which, in our case, improves the capacity of the line. Finally, the gain function is piecewise linear and depends on the number of trains; we show the existence of an optimal number of trains for which the gain is maximal. |
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| 15h30 |
Pause Café. |
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| 15h45 |
Neila Bhouri, Université Gustave Eiffel/Cosys/Grettia. |
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Resilience of Public Transportation Systems, application to Rennes' Network. |
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Abstract: Resilience can be defined as the ability of a system’s strategy to take back the functionality to its normal condition after a disruption: preventing damage to the system before disruption and mitigating losses during and after the event. This ability depends on the network structure and activities that can be undertaken to preserve or restore service in the event of a disaster or other disruption.
Resilience is defined by more than 10 performance dimensions (Robustness, Reliability, Recoverability, Adaptability, Survivability, Redundancy, Diversity, etc.). The presentation will browse the main components of public transportation resilience with an application to the Rennes transportation network focusing on reliability measures. |
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| 14h00 |
Audrey COMEMALE, CEREMA, DTerEst/DTMI/MT. Slides |
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FCD potential for traffic flow estimation. |
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| 14h45 |
Josué RIVERA, CEREMA, DTerOCC/DT/MOB. Slides |
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Safety and Acceptability of autonomous driving and Mobility (SAM): experimentation site - ONCOPOLE Hospital (Toulouse). |
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| 15h30 |
Ghada BEN SAID, Univ. Gustave Eiffel, COSYS/GRETTIA. Slides |
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Ride-hailing system using a fleet of autonomous electric vehicles. |
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| 14h00 |
Jean-Patrick Lebacque (Université Gustave Eiffel, Cosys/Grettia). |
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Mean field games for traffic flow models.. |
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| 14h45 |
Yeltsin Valero (Université Gustave Eiffel, Cosys/Grettia) & Zoi Christoforou (Université Gustave Eiffel & University of Patras, Greece). |
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Microscopic Traffic Modeling of Personal Mobility Devices - PMD. |
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| 15h30 |
Sara Jaber (Université Gustave Eiffel, Cosys/Grettia) & Benoit Oillo (Société Beemotion). |
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Microscopic Modeling of the travel time in public transport, thanks to the Dialexis device and to machine learning. |
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| 14h00 |
Sasan Amini, Technical University of Munich. |
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Move traffic network from user equilibrium toward system optimum. |
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| 14h45 |
Cyril Nguyen Van Phu, Université Gustave Eiffel, Grettia. |
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Estimation of road traffic state at a multi-lanes controlled junction |
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| 15h30 |
Hassan Idoudi, Université Gustave Eiffel, Grettia. |
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Impact of dynamic shelter allocation in online population evacuation management. |
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