HSL to begin tendering for bus services in Leppävaara, Finland August 23, 2018 | Europe News The Helsinki Regional Transport Authority/Helsingin Seudun Liikenne (HSL) has announced plans to begin the tendering process for feeder bus services in Leppävaara, Espoo. The selected operator is... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password