HSL awards contract for open-loop payment validators, Finland June 8, 2022 | Europe News, News The Helsinki Regional Transport Authority/Helsingin Seudun Liikenne (HSL) has awarded a EUR12.5 contract to supply at least 4,500 validators for its rollout of an open-loop contactless ticketing syste... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password