Rail connection Karlsruhe-Basel The section is a partial section of the rail connection Karlsruhe-Basel to be newly built and extended respectively in the area between Offenburg and Basel. It starts in the municipality of Herbolzheim and is 23.8 km long. In this section the already existing line Rheintalbahn will be extended to four tracks, the two new tracks being designed for a velocity of 250 km/h. Country: Germany, Federal State of Baden-Württemberg Client: DBBauProjekt GmbH, Karlsruhe Planning time: 2001-2004 Construction period: 2004-2012 Costs: 430 million Euro Services: - services of object planning for traffic facilities and engineering constructions, stages 3 and 4 - services for the planning of the technical systems (control and safeguarding technology, overhead system, electrotechnics) - environmental tolerance study - accompanying landscape preservation planning - sound and vibration studies - surveying - soil utilization and disposal concepts