Rail.One secures sleeper contract for HSR line in South Korea January 15, 2013 | Asia Pacific Company News Germany-based Rail.One GmbH has secured a contract to supply concrete sleepers for the under-construction Honam high speed rail (HSR) line. Under the contract, over 530,000 twin-block sleepers will be... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password