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

This paper is focused on the extension of the OASIS (Optimal Advanced System for Integrated Strategies) in order to take into account the multi-objective nonlinear optimization technique for coordinated ramp metering. The multi-objective function includes two costs functions: traffic and safety (Risk model) indices. OASIS is revisited and off-line simulation studies are conducted on real test site corresponding to A6W France motorway located in the south part of “Ile de France” Motorway networks. Five consecutive on-ramps are considered for the control. The obtained results are very promising.