Isolated versus coordinated ramp metering: Field evaluation results of travel time reliability and traffic impact

The majority of field evaluations are focusing on the traffic impact of the control actions. However, with the growing prosperity, consumers demand higher quality transport services, for which reliable transport networks are central. This paper is focused on the evaluation of the ramp metering impact based on both indices: traffic and the travel time reliability on the A6W motorway in Paris. Three strategies are implemented, tested and evaluated. Evaluations include more traditional traffic impacts on one hand and the travel time reliability evaluation on the other which corresponds to the add value of this paper. The results obtained indicate both improvement of the travel time reliability and the average travel time.