Work begins on Karlsruhe-Basel HSR Rastatt tunnel May 27, 2016 | Europe News Work has begun on the 4.27-km Rastatt tunnel in the Baden-Württemberg region of Germany. The tunnel is part of the Karlsruhe-Basel high-speed railway (HSR) project. The building information model... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password