Bundesautobahn 831
Route information
Length2.3 km (1.4 mi)
Major junctions
North endVaihingen auf den Fildern
South endnortheast of Sindelfingen
Highway system

Bundesautobahn 831 (translates from German as Federal Motorway 831, short form Autobahn 831, abbreviated as BAB 831 or A 831) is an autobahn in Germany.

The A 831 is one of the shortest autobahns in Germany, measuring 2.3 km and containing two junctions. Originally, the A 831 continued another 15 km to Gärtringen, where an intersection with a planned section of the A 81 would have been located. The A 81 north of Gärtringen was eventually cancelled, leaving a half-finished interchange that is one of the few in Germany that requires traffic to leave from the passing lane. As a result, for consistency, the A 81 took over the A 831's routing up to the Kreuz Stuttgart interchange with the A 8, where it heads west (concurrent with the A 8) to rejoin the original route.

The 2.3 km of autobahn that remained was initially not signed as the A 831. Heading northbound, travelers were told they were on the B 14; those coming from Stuttgart only saw signs for the A 8/A 81 once they passed Stuttgart-Vaihingen. The A 831 was again fully signed in mid-2009.

Exit list

B 14 Road continues as the B 14 towards Stuttgart
(-) Stuttgart-Vaihingen
(-) 4-way interchange Kreuz Stuttgart 4-way interchange A 8 E 52 A 81 E 41
A 81 B 14 E 41 Road continues as the A 81, B 14 and E 41
towards Sindelfingen