Freiburg city tunnel

from Wikipedia, the free encyclopedia
Freiburg city tunnel

The Freiburg city tunnel is a project currently being planned for the underground routing of the federal highway 31 in the city of Freiburg im Breisgau . With the completion of the city tunnel, the section of today's B 31 between the Freiburg-Mitte motorway junction and the eastern city limits is to be upgraded to the A 860 city ​​motorway .

history

In 1984 the Freiburg municipal council decided on the route of the B31-Ost in the Freiburg city area, but without a city tunnel for cost reasons. Nevertheless, the section of the city ​​tunnel was included as planning in the Federal Transport Infrastructure Plan in 1985 , which today corresponds to the status of further needs . This overall conception of the B31-Ost and city tunnel replaced the previous plans for the federal motorway 86 and a tunnel through the Roßkopf , the plans of which had already been discontinued in 1979 by Prime Minister Lothar Späth and Federal Minister of Transport Volker Hauff for cost reasons.

While the Freiburg-Breisach B31 section was included as an urgent requirement in the 1992 Federal Transport Infrastructure Plan , it was not possible to achieve this priority level for the city tunnel. The reason for this was the legal proceedings against the B31-Ost and the associated unsafe start of construction of the upgraded line.

At the end of 1996, work began between Kirchzarten and Freiburg, in the course of which the Kappler Tunnel and the Schützenalleetunnel were built. In 1999, the local council decided to build a four-lane city tunnel using the mining method and called for the subsequent dismantling of the Dreisamuferstraße to two lanes. In addition, the administration was commissioned to campaign for the upgrading of the city tunnel as a continuation of the B31-Ost in the urgent need at the regional council, the federal government and the state, if the federal traffic route plan were to be updated.

The line between Kirchzarten and Freiburg was opened in autumn 2002. In the Federal Transport Infrastructure Plan 2003 of July of the same year, the two-lane construction of the city tunnel was included in the urgent need , while the remaining two lanes remained further needs with planning rights .

On October 5, 2005, District President Sven von Ungern-Sternberg stated that it was not possible to finance the planning from state funds and that the project could not be implemented until 2015 at the earliest. After Heribert Rech , the interior minister responsible for traffic , had confirmed this in March 2006, the mayor of Freiburg, Dieter Salomon , proposed in March 2007 that the detailed planning for the city tunnel be pre-financed at the city's expense. Nevertheless, the city tunnel, along with 23 other transport projects, was put on hold by the state government and the earliest realization from 2025 was discussed.

In August 2007, the Ministry of the Interior categorically refused pre-financing. In the following month, Klaus Schüle , member of the state parliament, convinced Prime Minister Günther Oettinger of the sense of pre-financing. On July 30, 2009, the contract to pre-finance the design planning was signed. The city of Freiburg should pre-finance the design planning with around 5 million euros. The Breisgau-Hochschwarzwald district would bear the costs of the design planning for the Falkensteig tunnel contained therein to relieve the Buchenbacher district Falkensteig east of Freiburg on the B31 .

Test drilling for the city tunnel in Hildastrasse

In February 2012, the preliminary planning for the city tunnel was completed by the regional council and presented to the state transport ministry. The tunnel is to be connected to the existing Schützenalleetunnel with the feeder center at the Kronenbrücke over 1.8 kilometers . The two tunnel tubes with a diameter of 13 meters are to run partly under the Dreisam and, at a depth of 15 meters, partly laterally under the river bed. In May 2012, the Ministry of Transport confirmed the cost of the tunnel construction at 300 million euros, although it was still unclear whether the access at the level of the Ganter brewery would be designed as a half connection with access and exit on different sides or a full connection. In order to be able to continue the planning of the full connection, the consideration arose to rededicate the B31 from the motorway junction to the eastern city limits as a motorway. As a result, it is no longer the city but the federal government that has to pay for the additional costs of a full connection. In the same month, the Federal Ministry of Transport approved this proposal. In addition, the decision meant that the preliminary planning for the access and exit routes had to be rescheduled and the planning costs increased from five to six million euros. The preliminary planning was completed in March 2014 and the earliest possible start of construction was assumed in 2019.

Test drillings were carried out along the route as early as summer 2013. It was also declared that the listed Epiphany House would fall victim to the tunnel construction. In November 2013, the Baden-Württemberg state government, in cooperation with the local authorities, prioritized a list of 160 road construction projects, in which the city tunnel was also included as the A 860. In this list, which was submitted to the federal government for the update of the Federal Transport Infrastructure Plan in 2016, the Freiburg city tunnel was ranked second among the separately listed tunnel projects behind the Calw core city relief. The Falkensteig Tunnel, the realization of which was originally intended to be linked to that of the city tunnel, was on the sixth of seven places. Because the Falkensteig Tunnel is not mentioned in the Federal Transport Infrastructure Plan 2030 , the chances of its implementation in the near future are poor.

In January 2016, the cost estimate for the city tunnel was increased from 300 to 325 million euros. In the draft of the Federal Transport Infrastructure Plan 2030 presented in March 2016, the city tunnel is classified as the A 860 in urgent need with a benefit-cost ratio of 1.9 and a high urban development assessment. This means that the project is Template: future / in 5 yearslikely to be implemented by 2030 . The construction time is estimated at 6 to 7 years. In the summer of 2017, the Federal Ministry of Transport approved the plans including the full connection at the Ganter brewery. Now the city wants to start citizen participation.

At the beginning of August 2020, the regional council announced that the planning could not be completed until 2023. Responsibility for the tunnel will be transferred to Die Autobahn GmbH des Bundes on January 1, 2021 . The Freiburg branch will be located on Heinrich-von-Stephan-Straße in the new office building "Milestone 2". Originally, the final draft, which must be approved by the federal government, should be ready in 2021/2022. It is now expected in 2023. The municipal building department is examining the possible design of the above-ground traffic routing and public spaces. The municipal council should decide on two variants as a basis for discussion in June. Now it will not be ready until 2021. In September 2020, citizen participation, which had stalled due to the corona pandemic , is to be resumed.

Web links

Individual evidence

  1. ↑ The long wait for the A 860. (No longer available online.) In: chilli-freiburg.de. Archived from the original on September 27, 2013 ; accessed on March 18, 2016 .
  2. ↑ a b 4th meeting of the municipal council (public / non-public) , resolution of March 25, 2003
  3. ↑ a b c Uwe Mauch: Stadttunnel-Chronik from 1979 , Badische Zeitung from January 31, 2008, accessed on June 18, 2012
  4. ↑ 10th meeting of the municipal council (public / non-public) resolution of July 27, 1999
  5. ↑ gernot-erler.de: Erler: Region Freiburg benefits from federal traffic route plan . Press release of July 2, 2003, accessed June 18, 2012
  6. ↑ Karl-Heinz Zurbonsen: Freiburg: Freiburg city tunnel is concrete | SÜDKURIER Online. In: SÜDKURIER Online. Retrieved March 18, 2016 .
  7. ↑ a b Uwe Mauch: Freiburg: route for the city tunnel is . Badische Zeitung of February 11, 2012, accessed on June 18, 2012
  8. ^ Uwe Mauch: Freiburg: Planning: Ministry of Transport accepts city tunnel costs . Badische Zeitung of May 6, 2012, accessed on June 18, 2012
  9. ↑ freiburg.de: B 31 becomes a motorway with the city tunnel ( Memento from February 24, 2018 in the Internet Archive ) . Press release of May 21, accessed June 18, 2012
  10. ↑ Uwe Mauch: Freiburg: Entrances and exits at Ganter: City tunnel planning costs a million more and takes longer , Badische Zeitung, January 28, 2013, accessed on March 24, 2013
  11. ^ Joachim Röderer: Freiburg: Verkehr: Planning of the Freiburg city tunnel is making progress. In: www.badische-zeitung.de. Retrieved March 18, 2016 .
  12. ^ Freiburg: Schwarzwaldstrasse: 70 meter deep boreholes as preliminary investigations for the city tunnel. Retrieved August 21, 2013 .
  13. ↑ Uwe Mauch: Freiburg: Planning B31: A house has to give way for the Freiburg city tunnel , Badische Zeitung, June 28, 2013, accessed on November 11, 2013
  14. ↑ a b BVWP master plan (not accessible). (PDF; 6.9 MB) (No longer available online.) Federal Ministry of Transport and Digital Infrastructure, March 2016, p. 79 , archived from the original on March 16, 2016 ; accessed on March 18, 2016 .
  15. ↑ Uwe Mauch: Freiburg: Stadttunnel: Planners find new ways above ground for cyclists and pedestrians. In: www.badische-zeitung.de. Retrieved March 18, 2016 .
  16. ↑ Uwe Mauch: Freiburg: Bundesverkehrswegeplan: Freiburg politicians now see realistic chances to realize the city tunnel. In: www.badische-zeitung.de. Retrieved March 18, 2016 .
  17. ↑ Joachim Röderer: Freiburg city tunnel can come with full connection. Badische Zeitung, July 11, 2017, accessed on July 12, 2017 .
  18. ↑ Uwe Mauch: The Freiburg city tunnel should bring more traffic relief than expected. Badische Zeitung, August 3, 2020, accessed on August 7, 2020 .