Habib Haj-Salem

A dynamical two-dimensional traffic model in an anisotropic network

The aim of this paper is to build a dynamical traffic model in a dense urban area. The main contribution of this article is to take into account the four possible directions of traffic flows with flow vectors of dimension

Field Evaluation Results of New Isolated and Coordinated Ramp Metering Strategies in France

4

Traffic network ramp metering based on High Order Sliding Mode and flatness approaches: A case study

and not

REAL DATA SCREENING: PROBLEM STATEMENT, METHODS AND FIELD RESULTS

2

A MOTORWAY-TO-MOTORWAY CONTROL: RESULTS OF A SIMULATION STUDY

as in fluid mechanic on a plan. Traffic flows are viewed as confrontation results between users demands and a travel supply of the network. The model gathers elements of intersection theory and two-dimensional continuum networks.

On the robust guidance of users in road traffic networks

Abstract The paper is focused on the development and the field evaluation of the isolated and new coordinated ramp metering strategies on the A6W motorway in Paris. Three strategies are implemented, tested and evaluated. Traffic, environmental and safety indices are used during the evaluation process. A simple and robust coordinated strategy are developed and tested which corresponds to the added value of this paper. The second added value of this paper is the use of the generalized risk index function as safety index for the evaluation process.

Simulation-Based Evaluation of New Freeway Isolated Ramp Metering

Freeway traffic control is achieved using High Order Sliding Mode Control (HOSMC) and the concept of differentially flat systems. The main objective of this paper, which follows the work in [22] is to evaluate the impact of the traffic ramp metering on the freeway network using real field data of the French motorway A6.

An Algorithm for Robust Routing Strategies in Networks

Abstract The scope of this paper is the presentation of a general approach to the data cleaning problem and its solution in the traffic domain. The developed algorithms can be applied to urban and freeway traffic data collection processes. More precisely, two main algorithms have been developed, calibrated, evaluated, and applied to check and correct motorway and urban traffic data measurements in the Ile de France network.

Development of Coordinated Ramp-Metering Based on Multi-objective Nonlinear Optimization Functions: Traffic and Safety

Abstract The paper presents an approach to the design of motorway-to-motorway control. The presented approach is based on suitable application of ramp metering to a motorway merging area. The motorway-to-motorway control has been applied and tested in simulation. For use in the corresponding evaluation study, the integrated macroscopic model namely METACOR has been calibrated and validated on the basis of real traffic data selected under a broad spectrum of traffic conditions. Several control measures are introduced to ameliorate traffic performance including motorway-to-motorway control and ramp-metering. The obtained results prove that the motorway-to-motorway control approach has a significant potential for the amelioration of traffic network performance.

A simulation-based model for dynamic traffic assignment on guided vehicles

We present in this article a model for the guidance of users in raod traffic networks. It is well known since decades that a path with a reliable travel time can be obtained by maximizing, over the different possible paths, the probability of realizing a travel time less than a given time budget. We propose here an adaptation of this approach, in order to introduce robustness in the selection of the optimal path. A robust path here is a path that is not likely to change during the travel, and that admits acceptable alternative detours in case of failure.