In this paper, some field trials, conducted in the southern part of Ile de France motorway in Paris are presented. Field trials have been design and executed over a period of several months in the aim of investigating the traffic impact of ramp metering measures. More specifically, the field trials, reported in this paper, include a comprehensive data collection from the considered network (A6W motorway) over several weeks with isolated and coordinated ramp metering strategies. The main objectives of the field trials were the development, the test and the evaluation of the traffic impact of new isolated and coordinated strategies.