RET launches open-loop ticketing on Rotterdam Metro, Netherlands April 17, 2023 | Europe News, News Rotterdamse Elektrische Tram (RET) has launched an open-loop ticketing system across the Rotterdam Metro network. Thales has installed more than 800 Europay, Mastercard, and Visa (EMV) validators at g... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password