Upgradation of tram and trolleybus system in Silesian Agglomeration May 14, 2014 | Europe Tenders Country: Poland Organisation: Tramwaje Śl…skie S.A. Description: Tenders are invited to upgrade the tram and trolleybus transport system in Upper Silesian Agglomeration. Closing date: May 15, 2014 ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password