Bundesautobahn 81
Route information
Length283 km (176 mi)
Major junctions
North end
A 3 in Würzburg
South end
B 34 in Gottmadingen
StatesBavaria, Baden-Württemberg
Highway system
  • Roads in Germany
A73 A82

Bundesautobahn 81 (translates from German as Federal Motorway 81, short form Autobahn 81, abbreviated as BAB 81 or A 81) is a motorway in Germany. It branches off the A 3 at the Würzburg-West triangle and ends near the border with Switzerland.

The oldest part of the A 81 between the Weinsberg intersection (A 6) near Heilbronn and Dreieck Leonberg (A 8) near Stuttgart was finished in the years 1938 to 1940. This section included the first tunnel built for an autobahn, the 300-metre-long (980 ft) first Engelberg tunnel near Leonberg. When Weinsberg-Leonberg was upgraded to 3+3 lanes in the 1970s, the tunnel with its two lanes each and steep grades (up to 6%) became something of a bottleneck. In 1999 a new 2,530-metre-long (8,300 ft) Engelberg tunnel was opened.

Gärtringen: One of the few German autobahn exits to the left
Gärtringen: One of the few German autobahn exits to the left

Original plans called for the A 81 to be continued northwards skirting the north-west of Würzburg to join up with the A 7, but these plans were later abandoned. Instead, the A 81 shares a part of the A 8 to the Stuttgart intersection and then continues south on a motorway that was built as A 831 to Gärtringen, where it meets the original line again at a partly finished intersection. As a result of this change of plans, Gärtringen became one of the few exits in the German autobahn network that leave to the left.

Further south, the terrain required some spectacular engineering, including a 900-metre-long (3,000 ft) bridge near Horb that spans 125 m above the Neckar river. Currently, the A 81 ends near Singen.

Exit list

This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. Please consult this guideline for information on how to create one. Please improve this article if you can. (December 2021)
(1) Würzburg-West 3-way interchange A3 E41 E43
(2) Gerchsheim
Spitalwald parking area
Gerchsheimer Grund parking area
Services Kleinraststätte ob der Tauber
Rötensteinbrücke 387 m
parking area
(3) Tauberbischofsheim B27 B290
Taubertalbrücke 661 m
Steinbacher Höhe parking area
Muckbachtalbrücke 330 m
Löchle parking area
Schüpfbachtalbrücke 280 m
(4) Ahorn
Brombach parking area
Brücke über die Frankenbahn 50 m
parking area
Lindich parking area
(5) Boxberg B292
Rest area Holzspitze
Seegrund parking area
(6) Osterburken B292 B293
Denzer parking area
Großer Wald parking area
Services Kleinrastätte Jagsttal
Jagsttalbrücke 889 m
(7) Möckmühl
Egerten parking area
Kochertalbrücke 478 m
Straßebrücke 50 m
(8) Neuenstadt
Brettachtalbrücke 386 m
Sulzrain parking area
Tunnel Hölzerntunnel 470 m
Eberbachtalbrücke 310 m
Eberbachtal parking area
(9) Weinsberg 4-way interchange A6 E50
Bahnstrecke Crailsheim-Heilbronn 60 m
(10) Weinsberg / Ellhofen B39a
Reisberg parking area
Grafenwald parking area
(11) Heibronn / Untergruppenbach
(12) Ilsfeld
Services Wunnenstein
(13) Mundelsheim
Rest area Kälbling
(14) Pleidelsheim
Neckartalbrücke 410 m
(15) Ludwigsburg-Nord B27
Brücke über Frankenbahn 60 m
(16) Ludwigsburg-Süd
(17) Stuttgart-Zuffenhausen interchange B10
Brücke über Schwarzaldbahn 70 m
(18) Stuttgart-Feuerbach B295
Beutenbachtalbrücke 150 m
Rest area Engelberg/Gerlinger Höhe
Tunnel Engelbergtunnel 2530 m
(19) Dreieck Leonberg 3-way interchange A8 E52

A8 A81
( ) Leonberg-Ost
Friedensbrücke 320 m
Services Sindelfinger Wald
Rest area Sommerhofen

A8 A81
(20) Stuttgart 4-way interchange A8 E52 A831
(21) Sindelfingen-Ost
Straßenbrücke 60 m
(22) Böblingen-Ost
Straßenbrücke 50 m
Tunnel Lärmschutzdeckel 850 m (under construction until 2026 at least)
(23) Böblingen/Sindelfingen
(24) Böblingen-Hulb interchange B464
(25) Ehningen B14
Würmtalbrücke 242 m
(26) Hildrizhausen
(27) Gärtringen B14
Services Schönbuch
Tunnel Schönbuchtunnel 606 m
(28) Herrenberg B28
Ammertalbahn 50 m
Kochhartgrabenbrücke 252 m
Rest area Ziegler/Geyern
(29) Rottenburg B28a
Rest area Neckarblick/Hirtenhaus
Neckartalbrücke (Weitingen) 918 m
(30) Horb am Neckar B32
Talbrücke 90 m
parking area
(31) Empfingen B463
Mühlbachtalviadukt 582 m
parking area
(32) Sulz am Neckar
Rest area Hasenrain
(33) Oberndorf am Neckar
Trichtenbachtalbrücke 140 m
Talbrücke 130 m
parking area
parking area
Schlichemtalbrücke 240 m
Services Neckarburg
Neckarburgbrücke 365 m
(34) Rottweil B462
Rest area Eschachtal
Eschachtalbrücke 443 m
Neckartalbrücke 206 m
Bahnstrecke Rottweil-Villingen 50 m
(35) Villingen-Schwenningen interchange B27
parking area
(36) Tuningen B523
parking area
(37) Bad Dürrheim 3-way interchange A864 E531
Rest area Räthisgraben
Rest area Unterhölzer Wald
Donautalbrücke 318 m
(38) Geisingen
B31 B33 B311
Ziegelbuckbrücke 196 m
parking area
Immensitzbrücke 227 m
parking area
Talbachbrücke 484 m
Services / Motel Im Hegau
Brudertalbrücke 337 m
(39) Engen B31 B491
Bruckried/Klauseneck parking area
(40) Hegau 4-way interchange A98 E54 B33
(41) Singen (Hohentwiel) B33
Saubachbrücke 391 m
Talbrücke 70 m
Tunnel Hohentwieltunnel 833 m
(42) Hilzingen B314
Riederbachtalbrücke 216 m
Tunnel Heilsbergtunnel 483 m
Brücke über Hochrheinbahn 70 m
(43) Gottmadingen B34 E41 E54