To ease overloading on the line a new high-speed line from Frankfurt to Mannheim is being planned, cleared for top speeds of up to 300 km/h. The new line would mostly run close to the A5 and the A67 motorways. Deutsche Bahn originally proposed to build a bypass of the Mannheim Hauptbahnhof (the most important rail junction in southwestern Germany, although it is not a Category 1 station like Karlsruhe Hbf), but dropped this plan for the time being in 2006 due to strong community and political opposition. Construction has not started yet due to the difficulty in reaching agreement on the details of the project. Construction is expected to start in 2011 and be completed in 2017.