A81
Bundesautobahn 81
Route information
Length283 km (176 mi)
Major junctions
North end
A 3 in Würzburg
South end
B 34 in Gottmadingen
Location
StatesBavaria, Baden-Württemberg
Highway system
Bundesautobahn 73 number.svg A 73Bundesautobahn 92 number.svg A 92

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

(1) Würzburg-West 3-way interchange A 3 E 41 E 43
(2) Gerchsheim
Spitalwald parking area
Gerchsheimer Grund parking area
Services Kleinraststätte ob der Tauber
Rötensteinbrücke 387 m
parking area
(3) Tauberbischofsheim B 27 B 290
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 B 292
Rest area Holzspitze
Seegrund parking area
(6) Osterburken B 292 B 293
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 A 6 E 50
Bahnstrecke Crailsheim-Heilbronn 60 m
(10) Weinsberg / Ellhofen B 39a
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 B 27
Brücke über Frankenbahn 60 m
(16) Ludwigsburg-Süd
(17) Stuttgart-Zuffenhausen interchange B 10
Brücke über Schwarzaldbahn 70 m
(18) Stuttgart-Feuerbach B 295
Beutenbachtalbrücke 150 m
Rest area Engelberg/Gerlinger Höhe
Tunnel Engelbergtunnel 2530 m
(19) Dreieck Leonberg 3-way interchange A 8 E 52

A 8 A 81
( ) Leonberg-Ost
Friedensbrücke 320 m
Services Sindelfinger Wald
Rest area Sommerhofen

A 8 A 81
(20) Stuttgart 4-way interchange A 8 E 52 A 831
(21) Sindelfingen-Ost
Straßebrücke 60 m
(22) Böblingen-Ost
Straßebrücke 50 m
(23) Böblingen/Sindelfingen
(24) Böblingen-Hulb interchange B 464
(25) Ehningen B 14
Würmtalbrücke 242 m
(26) Hildrizhausen
(27) Gärtringen B 14
Services Schönbuch
Tunnel Schönbuchtunnel 606 m
(28) Herrenberg B 28
Ammertalbahn 50 m
Kochhartgrabenbrücke 252 m
Rest area Ziegler/Geyern
(29) Rottenburg B 28a
Rest area Neckarblick/Hirtenhaus
Neckartalbrücke (Weitingen) 918 m
(30) Horb am Neckar B 32
Talbrücke 90 m
parking area
(31) Empfingen B 463
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 B 462
Rest area Eschachtal
Eschachtalbrücke 443 m
Neckartalbrücke 206 m
Bahnstrecke Rottweil-Villingen 50 m
(35) Villingen-Schwenningen interchange B 27
parking area
(36) Tuningen B 523
parking area
(37) Bad Dürrheim 3-way interchange A 864 E 531
Rest area Räthisgraben
Rest area Unterhölzer Wald
Donautalbrücke 318 m
(38) Geisingen
B 31 B 33 B 311
Ziegelbuckbrücke 196 m
parking area
Immensitzbrücke 227 m
parking area
Talbachbrücke 484 m
Services / Motel Im Hegau
Brudertalbrücke 337 m
(39) Engen B 31 B 491
Bruckried/Klauseneck parking area
(40) Hegau 4-way interchange A 98 E 54 B 33
(41) Singen (Hohentwiel) B 33
Saubachbrücke 391 m
Talbrücke 70 m
Tunnel Hohentwieltunnel 833 m
(42) Hilzingen B 314
Riederbachtalbrücke 216 m
Tunnel Heilsbergtunnel 483 m
Brücke über Hochrheinbahn 70 m
(43) Gottmadingen B 34 E 41 E 54