The Deputy Minister for Infrastructures, Transport and Networks Mr. Ioannis Mangriotis participated in a working session held today at the premises of ATTIKO Metro in Thessaloniki in the presence of Thessaloniki Metro Manager Mr.G. Konstantinidis, the CW Supervising Engineer Mr. J. Vacalopoulos and of other officials; the agenda of the working session included the progress of Thessaloniki Metro construction works, the actions that have been taken to rapidly remove the mercury from the area of “VENIZELOU” station, so that the works may continue unobstructedly, the archaeological works, the expropriations and the traffic interventions in the city.