RAMP METERING IMPACT ON URBAN CORRIDOR TRAFFIC - FIELD RESULTS

Field trial results when applying a particular ramp metering strategy to an urban corridor network (Corridor Peripherique in Paris) includin g a motorway, a parallel arterial, and connecting radial streets are r eported. The impact of ramp metering on corridor traffic is studied by comparative evaluation of several performance indices in the cases wi th and without control. The main finding of the field trial is that ap plication of an efficient ramp metering strategy considerably improves traffic conditions not only of. the motorway but also on the parallel arterial and on the whole corridor network. This improvement is found to be even more accentuated in presence of nonrecurrent congestion ca used by traffic incidents.