GZM deploys 31 Irizar battery-electric buses for public transport network in Upper Silesia, Poland August 3, 2026 | Europe News, News Górnośląsko-Zagłębiowska Metropolia (GZM) has deployed a fleet of 31 Irizar ie battery-electric buses that will enter passenger service across the Upper Silesian metropolitan area in southern Poland. ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password