Technische Universität München Luft- und Raumfahrt-Fakultät (Aerospace Campus), and suburban towns (Neubiberg, Ottobrunn, and Taufkirchen). The six-kilometre extension with four new stations is estimated to cost 300-400 million Euros, and the exact route hasn't been determined yet. Due to the cost factor, the extension would be built above ground since the tunnel costs approximately €80 million per kilometre. The Bavarian minister president, Markus Söder, is pushing for the large portion of federal funding, following the recent change in the outdated federal law, Gemeindeverkehrsfinanzierungsgesetz (Municipal Transportation Finances Act), to address the issues with cost factor analysis for the suburban regions and beyond. No construction or completion date is given yet. U6 (south): extension to Martinsried This extension will serve a large biotech centre at Martinsried. The estimated cost in 2012 was €73.3 million: since the extension crosses the municipality boundary of Munich, the large percentage of funding (95%) comes from Free State of Bavaria while Planegg and Munich contributed smaller percentages. The planning was approved in 2013, and the anticipated completion date was 2014–2015. However, the extension must go through the contaminated area and former gravel pit later filled in, leading to the complications and delays in planning. The parking garage at Martinsried station is being constructed now and to be completed at end of 2021. The construction of subway tunnel will start in 2022 with anticipated completion in 2026. U6 (north): extension to Munich Airport This would be only U-Bahn line with direct access to the Munich Airport. At Hallbergmoos station, U6 would continue in parallel with S8 line to the airport and stop at both terminals before travelling further to Eching and Neufahrn. However, the plan was abandoned. U9 and U29 bypass lines On 11 February 2014, SWM/MVG announced a detailed report for the construction of a new 10.5 km bypass line, a sixth intracity underground line, to be called the U9. The new line will relieve the overburdened U1/U2/U7/U8 and U3/U6 lines, especially the transfer stations at Sendlinger Tor (U1/U2/U7/U8 and U3/U6), Hauptbahnhof (U1/U2/U7/U8, U4/U5, and S-Bahn), and Odeonsplatz (U3/U6 and U4/U5), and will shorten the travel time between the Hauptbahnhof and the Allianz Arena by removing the need to transfer at Marienplatz or Odeonsplatz. MVG is predicting tremendous growth of passenger traffic in the northern section of Munich in the next twenty years and wants to plan accordingly. The proposal was revised and approved in January 2018