Bundesstrasse 31

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Template: Infobox high-ranking street / Maintenance / DE-B
Bundesstrasse 31 in Germany
Bundesstrasse 31
 European Road 54 number DE.svg
map
Course of the B 31
Basic data
Operator: GermanyGermany Federal Republic of Germany
Start of the street: Breisach
( 48 ° 1 ′  N , 7 ° 35 ′  E )
End of street: Weißensberg
( 47 ° 35 ′  N , 9 ° 44 ′  E )
Overall length: approx. 200 km

State :

Development condition: two-lane, three-lane, four-lane
Kappler Tunnel (Freiburg) 02.jpg
Bundesstrasse 31 near Freiburg
Course of the road
France Continue on  D 415 towards Colmar
State of Baden-Württemberg
District of Breisgau-Hochschwarzwald
EU border crossing Border crossing Breisach / Vogelgrun
flow Rhine ( Rhine bridge Breisach 283 m)
flow Möhlin
Roundabout Breisach on the Rhine
Bypass Breisach OT Gündlingen bypass
Junction (64)  Bad Krozingen A5 E35
Autobahn beginning replaced by A5 E35
City district of Freiburg im Breisgau
Junction (63)  Freiburg-South A5 E35
Junction Freiburg-Tiengener Strasse B3
Start of expressway Beginning of the motor road
Junction Freiburg-Besanconallee
Junction Freiburg-Basler Landstrasse
Expressway end End of the highway
Locality Freiburg in Breisgau B3 B31a
Start of expressway Beginning of the motor road
tunnel (932 m)  Schützenalleetunnel
tunnel (1,230 m)  Kappler tunnel
Junction Littenweiler
District of Breisgau-Hochschwarzwald
Template: AB / Maintenance / Empty Symbol: tourist Southern Black Forest Nature Park
Junction Kirchzarten
Junction Buchenbach
Expressway end End of the highway
parking spot Symbol: leftSymbol: left Tschuuderecke car park
Locality Falkensteig
parking spot Symbol: rightSymbol: right Parking s'Himmelriich
Template: AB / Maintenance / Empty Symbol: tourist Hell Valley
parking spot Symbol: leftSymbol: leftHirschsprung car park
parking spot Symbol: rightSymbol: right Poschthalde car park
parking spot Symbol: leftSymbol: left Parking lot Höllbach
parking spot Symbol: leftSymbol: leftOswaldkapelle car park
parking spot Symbol: leftSymbol: left Teufelschwänzli car park
parking spot Symbol: leftSymbol: left Parking lot at Verschnuufeckli
Template: AB / Maintenance / Empty Symbol: tourist Ravenna Gorge
Junction Hinterzarten B500
parking spot Symbol: rightSymbol: right S'Grafewäldele car park
parking spot Symbol: rightSymbol: rightParking lot Goschehobel
parking spot Symbol: leftSymbol: left Vierthäler car park
Motorway junction Titisee -West
Template: AB / Maintenance / Empty Symbol: tourist Titisee
Motorway junction Neustadt -West
Motorway junction ToB317 B500
Start of expressway Beginning of the motor road
flow Expert
parking spot Symbol: leftSymbol: left Parking lot Schatteloch
parking spot Symbol: leftSymbol: left Wiidewiibli car park
Expressway end End of the highway
Motorway junction Neustadt-Mitte
flow Gutach ( valley bridge 617 m )
parking spot Symbol: rightSymbol: right Bosseharzer car park
Motorway junction Friedenweiler
Motorway junction Rötenbach
Template: AB / Maintenance / Empty Symbol: tourist Black Forest Park Löffingen
Motorway junction Loeffingen
Start of expressway Beginning of the motor road
Template: AB / Maintenance / Empty Symbol: tourist Wutach Gorge
parking spot Symbol: rightSymbol: right Haiburg car park
Motorway junction Unadingen
Schwarzwald-Baar district
Template: AB / Maintenance / Empty Symbol: tourist Gauchach Gorge
bridge (791 m)  Gauchach Valley Bridge Döggingen
tunnel (1,000 m)  Döggingen tunnel
Motorway junction Bräunlingen OT Döggingen
parking spot Symbol: leftSymbol: left Parking lot Gauchenescht
parking spot Symbol: rightSymbol: right Iiseri Hoamet car park
Expressway end End of the highway
Motorway junction Hüfingen B27 B33
Template: AB / Maintenance / Empty together with B33direction Geisingen
Bypass Bypass  Donaueschingen OT Pfohren
flow Danube
Tuttlingen district
Bypass Dreilärchen bypass
parking spot Symbol: rightSymbol: right Veschperplätzli car park
parking spot Symbol: leftSymbol: left Stockwiese parking lot
Bypass Gutmadingen bypass
flow Danube
Bypass Geisingen bypass 
Template: AB / Maintenance / Empty together with the B33direction of Hüfingen
Junction (38)  Geisingen A81 E41 B33 B311
Autobahn beginning replaced by A81 E41 A98 E54 B313
District of Constance
Locality Stockach B313
Junction (13)  Stockach -EastA98 E54
Template: AB / Maintenance / Empty Parallel route continued as B31nto Überlingen industrial area
Start of expressway Beginning of the motor road
Template: AB / Maintenance / Empty Symbol: tourist Lake Constance
Green bridge 3 × green bridge
Lake Constance district
Green bridge 3 × green bridge
Junction Hödingen
Template: AB / Maintenance / Empty Symbol: tourist Plane collision in Überlingen
Motorway junction Überlingen- North
Motorway junction Andelshofen
Motorway junction Überlingen commercial area
Expressway end End of the highway
crossing Überlingen B31
District of Constance
Locality Ludwigshafen on Lake Constance
Lake Constance district
Locality Sipplingen
Motorway junction Überlingen L 195c
parking spot Icon: Left RightIcon: Left Right parking spot
Motorway junction Überlingen L 200  K 7786
parking spot Icon: Left RightIcon: Left Right parking spot
parking spot Symbol: rightSymbol: right parking spot
Motorway junction Überlingen OT Nussdorf
parking spot Symbol: leftSymbol: left parking spot
Template: AB / Maintenance / Empty Symbol: tourist Pilgrimage Church Birnau
parking spot Symbol: leftSymbol: left parking spot
flow Linz Aach
Template: AB / Maintenance / Empty Symbol: touristBirnau concentration camp cemetery
Locality Unteruhldingen
parking spot with toilet Icon: Left RightIcon: Left Right Parking lot (with toilet)
Rest stop Rest stop
Locality Meersburg B33
Extension of the route, planning completed:
tunnel (300 m)  Stetten-Lerchenberg tunnel
tunnel (240 m)  Stetten-Hüllo tunnel
flow Dysenbach
Junction StettenB33
Green bridge 2 × green bridge
tunnel (300 m)  Immenstaad tunnel
Discontinued after expansion:
Locality Hagnau on Lake Constance
parking spot Symbol: leftSymbol: left parking spot
Gas station Icon: Left RightIcon: Left Right Gas station
Bypass Immenstaad bypass  on Lake Constance
Truck lock Partial approval for vehicles up to 3.5 t
Start of expressway Beginning of the motor road
Motorway junction Fischbach
Motorway junction Friedrichshafen -Northwest
Motorway junction Friedrichshafen- West
Expressway end End of the highway
Template: AB / Maintenance / Empty Expansion of the line under construction by 2021:
tunnel (700 m)  Waggershausen tunnel
Template: AB / Maintenance / Empty Diversion for trucks. Discontinued after expansion:
Locality Fischbach
Locality Friedrichshafen
Template: AB / Maintenance / Empty Discontinued after expansion:
Motorway junction Friedrichshafen- Riedlepark
Roundabout Zeppelin shipyard area
Start of expressway Beginning of the motor road
Motorway junction Friedrichshafen -Mitte
tunnel (430 m)  Riedlepark tunnel
flow Rotach
Motorway junction Friedrichshafen -Ehlersstrasse
Motorway junction Friedrichshafen - Airport Symbol: flight B30
Expressway end End of the highway
Motorway junction Friedrichshafen -East
Motorway junction Eriskirch -West
Start of expressway Beginning of the motor road
flow Shot
tunnel (250 m)  Mauernried tunnel
Expressway end End of the highway
Motorway junction Eriskirch -East
Motorway junction Langenargen - Oberdorf
flow Bad
Motorway junction Kressbronn on Lake Constance B467
Start of expressway Beginning of the motor road
Template: AB / Maintenance / Empty Symbol: tourist Argental
Free State of Bavaria
District of Lindau (Lake Constance)
tunnel (150 m)  Diepoldsberg tunnel
Expressway end End of the highway
Motorway junction Lindau (Lake Constance) B12
Junction (3)  Sigmarszell A96 E43 E54 B308
  • Under construction
  • In planning
  • Traffic control system
  • The federal highway 31 (abbreviation: B 31 ) is a federal highway in the south of Germany running in an east-west direction . It runs from Breisach am Rhein on the border with France to the Sigmarszell junction on the federal motorway 96 (A 96) near Lindau (Lake Constance) . Between the transition from the federal motorway 98 (A 98) to the B 31 at the Stockach -Ost junction and the Sigmarszell junction on the A 96, it is a section of the E 54 Paris - Munich European route .

    course

    Important places on the B 31 and connections to other highways:

    State of development

    The development of the B 31 is structured as follows:

    section Stripes Dividing strip length comment
    Breisach am Rhein - AS Bad KrozingenA5 2 No 11 km
    A5AS Freiburg -Süd - B3Freiburg Tiengener Straße 2 No 3.5 km
    B3 Freiburg Tiengener Strasse - Freiburg Basler Landstrasse 4th Yes 3 km Motorway-like , truck toll is mandatory
    Freiburg Basler Landstrasse - L 133 Freiburg Schwarzwaldstrasse 4.5 km urban
    L 133 Freiburg Black Forest Road - L 126 AS Kirchzarten 7 km Motorway-like, truck toll is mandatory
    L 126 AS Kirchzarten - L 128 AS Buchenbach 3 No 3 km largely free of partial plans
    L 128 AS Buchenbach - Höllental 2 4 km
    Höllental - Hirschsprung 3 2 km largely free of partial plans
    Hirschsprung - Höllsteig 4th 4 km
    Höllsteig - HinterzartenB500 3 3 km
    B500Hinterzarten - Neustadt-WestB317 B500 2 6 km largely free of partial plans
    B317 B500Neustadt-West - L 182 Rötenbach 3 10 km Partial plan free, except for the intersection with the L 182
    L 182 Rötenbach - Döggingen tunnel 2 11.5 km
    Döggingen - Hüfingen tunnelB27 B33 3 6.5 km
    B27 B33Hüfingen - AS GeisingenA81 B311 2 13.5 km
    A98 B31nAS Stockach -Ost - AS SigmarszellA96 B308 2 No 70 km From Friedrichshafen mostly free of partial plans

    history

    Bundesstraße 31 has its origins in old Roman roads connecting fortresses on the Rhine (Breisach) with the Roman military road east of the Black Forest. It emerged from Reichsstrasse  31 (1934) in 1949 .

    After Austria was " annexed " to the Third Reich (1938), the route from Lindau to Austria was extended. First it ran south from Bregenz to Feldkirch . Here the R 31a branched off to the Liechtenstein border at Tisis .

    The road continued via Alpe Rauz am Arlberg ( R 17 ), Landeck (Tyrol) ( R 24 ), Imst (R 24), Telfs ( R 309 ) and Zirl ( R 2 ) to Innsbruck (R 2). From here it went on via Jenbach (R 318), Wörgl ( R 15 ), Ellmau (R 15a) and Lofer (R 21) back to the Bavarian border. Via Schneizlreuth (R 305) and Bad Reichenhall (R 20) the route reached the Austrian border again. The last section went on Salzburg , Vöcklabruck , Lambach (R 339/ 340 ) and Wels (R 332) to Linz .

    During the Second World War , the western part was extended into the occupied Alsace , which was annexed to the German Empire . The route ran via Neubreisach (R 9) and Colmar (R 38) to the gorge pass . As the war continued, the line was extended to Gérardmer . The section to Colmar is part of the N 415 (today D 415) and Colmar-Gérardmer is part of the N 417 (today D 417).

    On February 6, 1949, a serious bus accident occurred between Döggingen and Unadingen near the old Gauchach bridge in the so-called Dögginger Loch . Due to a brake failure, a bus filled with skiers from the Radolfzell area fell down an embankment in the Gauchach. 22 people lost their lives, and numerous others suffered injuries, some of them serious. A memorial stone near the accident site today commemorates the accident.

    Previous routes and names

    Originally the R 31 and B 31 ran differently in the following sections:

    • West of Freiburg: through the towns of Oberrimsingen , Munzingen and Tiengen ; Now guided tour to the Bad Krozingen junction (former section of the state road 120) and gap to the Freiburg Süd junction of the (A 5) federal motorway 5 (original route downgraded as district roads 4999 and 9864)
    • Donaueschingen area: Until the construction of today's B 27 east of Donaueschingen in the 1970s, the B 31 and the B 27 formed an intersection in the city center. Today's direct route from Geisingen south of Pfohren to today's junction was not built until the 1980s.
    • Southeast from Donaueschingen to Lake Constance: between the places Geisingen and Stockach; Now guided tour to the Geisingen junction (there transition to the B 311 ) and the gap to the junction with the B 313 at the Stockach-Ost junction of the A 98 (original route downgraded as a section of state roads 191 and 194)
    • In the Überlingen area: through Überlingen, Nussdorf, Unteruhldingen, Meersburg
    • In the Lindau area: through Kressbronn, Lindau ( R 12 ) and Lindau-Zech to the German-Austrian border ; now guided tour north of Lindau to the Sigmarszell junction of the A 96 (there transition to the B 308 ).

    Further expansion

    To the west of Freiburg city center, the Mitte motorway feeder road was also built as the B 31a along the Dreisam to the Freiburg Mitte motorway junction without the intersection of the A 5, and the Umkirch bypass on the other side of the motorway as the first section of a completely new route (the B 31 West ) towards Breisach. The entire work in the section Umkirch to Gottenheim should be completed by spring 2012, but continued until the release on September 7, 2012. The planning for the extension from Gottenheim to Breisach was stopped by the state government in 2011. Planning was resumed in 2015, but environmentalists and the Freiburg Regional Council are arguing at the beginning of 2017 due to new reports.

    Furthermore, the B 31 has been expanded in many areas in recent years by bypasses, so at the turn of the millennium traffic in the east of Freiburg was shifted from Littenweiler , Ebnet and Zarten to a newly built, four-lane motorized road . The Kappler Tunnel and the Schützenalleetunnel were built for this purpose. At the same time was in Döggingen the combination of Gauchachtalbrücke Döggingen about Dögginger hole and tunnel Döggingen built. In addition, areas near Löffingen and Rötenbach were expanded to three lanes (2 + 1). Such an expansion also took place between the connection of the B 317 at Titisee and Neustadt Ost, so that the aforementioned area of ​​Titisee-Neustadt is now also classified as a motor vehicle. In Friedrichshafen, an intersection-free route was implemented from the eastern city limits in the suburb of Kitzenwiese to the ZF plant in the 1990s. The section to the west to the Riedlewald was released on December 7, 2001. On November 24, 2014, the ground-breaking ceremony took place to close the last section of the Friedrichshafen bypass to the western city limits between the Fischbach district and the neighboring municipality of Immenstaad to the west. This more than 7 kilometers long section is to be opened to traffic in 2020. There is an aerial photo of the entire scope of the project. The federal government is contributing 100 million euros for the construction project.

    In the meantime, the expansion from Immenstaad to Überlingen is in the planning stage, with various route variants near and far from the lake being discussed controversially. In the area north of Überlingen, a section of the B31n, built in the early 1980s, has already been put into operation in the area of ​​the easternmost section. An expansion is planned for the area between Immenstaad and Meersburg, but this is met with protests. Regio TV Bodensee has also created a video "Info evening" for this expansion. Furthermore, the regional council of Tübingen operates its own information page.

    The continuation on the Alsatian side has also been expanded in recent years to the Rhine Valley motorway A 35 there , but downgraded from a French national road while retaining the number as Departementsstraße 415 . This reallocation took place in 2006. All these expansion measures (also as a replacement for a southern Black Forest motorway originally planned with the project name A 86 ) led to a sharp increase in transit traffic, so that especially in Freiburg and in the town of Falkensteig, the population was tunneling under the particular locations, as a bypass road is difficult and expensive due to the topography. In addition, the tubes of the Dögginger Tunnel (both two-lane) are currently only approached via one bridge, two two-lane bridges were planned, but so far there was no money. The Donaueschingen - Löffingen tunnel can only be used in one lane, as it is too dangerous for both lanes to merge in the tunnel. In the meantime, the construction of the second bridge can be expected in 2019 [obsolete] , the construction time should be 3 years Template: future / in 2 years.

    After a rock fall in Höllental (between Freiburg and Hinterzarten) in 2009, rock protection measures were carried out in this area at the end of September / beginning of October 2010. The B 31 was completely closed to traffic and largely diverted via the Glottertal and the Thurner . A specialist company removed several cubic meters of rock as well as trees and bushes. The cost of the work amounted to around 600,000 euros. Further rock securing measures that impaired traffic were initially completed in October 2015. In the summer of 2020, rock securing work was carried out again, a new scree fence was installed at the Hirschsprung and the roadway in Falkensteig was renewed, which led to the B 31 being closed for almost two weeks. This attracted walkers and cyclists.

    After the completion of the Freiburg city tunnel , which is in the planning stage , the B 31 will be upgraded to the 860 federal motorway between the end of the expansion at Kirchzarten and the end of the expansion at Umkirch . The Freiburg-Mitte junction of the A 5 , already designed as a clover leaf , will then become the Freiburg motorway junction . In one presented in February 2020 by the Freiburg Government Bureau overview map for further expansion planning the route between Freiburg and Donaueschingen a fourth tunnel beside Freiburg City Tunnel and the Falkenstein- and Hirschsprung tunnel is shown, that of the Löffeltalkurve when Imbery in Höllentalbahn up to Hinterzarten up to the level of the former inn Lafette should be enough. Template: future / in 5 years

    Furthermore, an expansion for the 10.5 km long Kressbronn-Lindau route was or is being discussed, reports the Schwäbische Zeitung . However, according to a report from 2016, this plan seems "more uncertain than ever". A four-lane expansion was or is under discussion, because the volume of traffic is enormous.

    Bundesstrasse 31n

    The federal road 31n (abbreviation B 31n ) is the official name of road sections that will replace the old B 31 as bypass roads after completion . Between Stockach and Überlingen it was created to complement the old route that runs close to Lake Constance. It forms the extension of the A 98. There are currently no exits on the B 31n between Stockach-Ost and Überlingen-Nord. The old road is still classified as B31.

    tourism

    Through its course in the Upper Black Forest, the B 31 opens up classic holiday areas around Hinterzarten, Titisee and Neustadt. It also provides access to the Feldberg area. It also links the Black Forest holiday region with Lake Constance. The passage through the Höllental with its deer monument is a typical holiday route, this is underlined by the naming of rest areas with Alemannic names in order to bring the linguistic peculiarities of the region closer to the guest. One example is "Verschnuufeckli" = place to breathe easy after a winding route. Since the 1990s at the latest, negative effects on tourism have been discussed in connection with the further expansion of the road. Against the background of the fact that the traffic density on the B 31 near Hinterzarten increased by 19.4% between 2010 and 2018, demands were made in the local council in 2019 to limit these effects.

    See also

    literature

    • Hans-Otto Mühleisen (Ed.): B 31 East: a street towards Freiburg . Jos-Fritz-Verlag, Freiburg [Breisgau] 2002, ISBN 978-3-928013-22-2 .
    • Daniel Schneider: The development history of the B 31 between Freiburg im Breisgau and Breisach am Rhein , in: Walter Laub / Bernhard Kenk / Daniel Schneider: The B 31-West ... in and around Umkirch. Umkirch 2007, OCLC 315875638 , pp. 7-20.
    • Carsten Friedrich Vogelpohl: B 31-Ost: the disputes over east-west traffic in Freiburg i. Br . Donzelli-Kluckert, Bremgarten 2008, ISBN 978-3-933284-19-8 .

    Web links

    Commons : Bundesstrasse 31  - Collection of pictures, videos and audio files


    Individual evidence

    1. ↑ Four lanes in the Freiburg area, partially expanded to resemble a motorway; Freiburg – Geisingen and Stockach – Überlingen partially expanded to three lanes and free of intersections
    2. ^ Carsten Wasow: The federal and former imperial roads in Germany. (No longer available online.) Archived from the original on September 7, 2012 ; Retrieved December 12, 2011 (private website).
    3. www.nq-online.de
    4. For the history see Daniel Schneider: The history of the development of the B 31 between Freiburg im Breisgau and Breisach am Rhein, pp. 7-20.
    5. ^ Manfred Frietsch: New ways for pedestrians, cyclists and tractors. In: badische-zeitung.de. Badische Zeitung , January 22, 2011, accessed on December 12, 2011 (newspaper article).
    6. Kathrin Blum: District of Breisgau-Hochschwarzwald: Umkirch to Gottenheim: Inauguration of the B31-West: Ceremony with critical tones , Badische Zeitung, September 7, 2012, accessed on March 28, 2013
    7. Sebastian Wolfrum: District of Breisgau-Hochschwarzwald: Expansion to Breisach: Conservationists: B 31 West may not be built. Badische Zeitung, January 6, 2017, accessed on January 7, 2017 .
    8. Traffic clearance at the Riedleparktunnel - Schwäbische from November 26, 2001 . In: Swabian . ( schwaebische.de [accessed on October 15, 2018]).
    9. ^ City of Friedrichshafen: B 31 new. Retrieved August 15, 2019 .
    10. New B 31 flight, Immenstaad - Friedrichshafen, 06/2018. Retrieved August 15, 2019 .
    11. BMVI - Bär: The federal government is investing 100 million euros in the new construction of the B 31 near Friedrichshafen. Retrieved August 15, 2019 .
    12. Dossier. Retrieved August 17, 2019 .
    13. B31 route: Citizens' initiatives demonstrate on the main road in Hagnau - schwaebische.de. Retrieved August 15, 2019 .
    14. Information evening on the expansion of the B31 section Immenstaad - Meersburg | 02/13/2019. Retrieved August 15, 2019 .
    15. The plans to expand and rebuild the B 31 continue | B 31 in dialogue. Retrieved August 15, 2019 .
    16. The number of vehicles driving through Falkensteig daily on the B31 increased from 17,140 to 21,509 between 2010 and 2018, cf. Traffic development at the permanent counting point B31 Falkensteig. Road traffic control center Baden-Württemberg, April 3, 2019, accessed on November 4, 2019 .
    17. The Döggingen tunnel had construction costs of 40.3 million euros, the Gauchachtal bridge Döggingen cost 16.8 million euros.
    18. Wulf Rüskamp: Südwest: Second B-31 bridge over the Gauchach until 2021. Badische Zeitung, December 27, 2016, accessed on June 13, 2017 .
    19. ^ Karl-Heinz and Mirko Zurbonsen: Deer jump without deer. In: suedkurier.de. Südkurier, August 9, 2010, accessed December 12, 2011 (newspaper article).
    20. Karl-Heinz Zurbonsen: mountaineers clean the Hell Valley. In: suedkurier.de. Südkurier, September 29, 2010, accessed December 12, 2011 (newspaper article).
    21. ^ District of Breisgau-Hochschwarzwald: Traffic artery: Security in Höllental has ended after five years - badische-zeitung.de. Retrieved January 1, 2016 .
    22. Sebastian Krüger & Markus Donner: The B 31 in Höllental will be closed for two weeks from June 22nd. Badische Zeitung, June 7, 2020, accessed on August 14, 2020 .
    23. Max Schuler: Höllental is open earlier than expected. Badische Zeitung, July 4, 2020, accessed on August 14, 2020 .
    24. Press release of the City of Freiburg, May 23, 2012 ( Memento of February 24, 2018 in the Internet Archive ) B 31 becomes a motorway with the city tunnel
    25. Michael Dörfler: What is being built and planned on the B31 . In: Badische Zeitung, Hochschwarzwald edition . February 1, 2010, p. 29 ( badische-zeitung.de [accessed on May 11, 2020]).
    26. Third track - if it does, it will take ... Accessed August 15, 2019 .
    27. B 31: Third track is more uncertain than ever. Retrieved August 15, 2019 .
    28. A whole region is stuck in traffic. Retrieved August 15, 2019 .
    29. The Alemannic names of the rest areas as well as their meaning and the exact location on the B 31 can be viewed on the website of the Freiburg Regional Council
    30. Stefanie Röder, Ruggero Schleicher-Tappeser: Possible effects of an expansion of the B 31 on the structural development in the Hinterzarten-Titisee-Neustadt area: preliminary investigation (=  EURES discussion paper . Dp17). EURES, Freiburg i. Br 1992, DNB  930470486 , p. 38 ff .
    31. See traffic development at the permanent counting point B31 Hinterzarten. Baden-Württemberg Road Traffic Control Center, April 3, 2019, accessed on December 5, 2019 . Heavy goods traffic even increased by 38.8% in this period.
    32. Susanne Gilg: "The noise has become unbearable". Hinterzarten and Breitnau want to jointly submit an application to the regional council for a night speed limit on the B31 . In: Badische Zeitung, Hochschwarzwald edition . July 18, 2019, p. 23 ( badische-zeitung.de ).