Bundesautobahn 21

Federal motorway in Germany
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A 21 shield}}
A 21
Bundesautobahn 21
Map
Route information
Length50 km (31 mi)
Location
CountryGermany
StatesSchleswig-Holstein, Lower Saxony (planned)
Highway system
  • Roads in Germany
← A 20→ A 23

Bundesautobahn 21 (translates from German as Federal Motorway 21, short form Autobahn 21, abbreviated as BAB 21 or A 21) is an autobahn in Germany.

It runs from an interchange with the A 1 at Bargteheide to Wankendorf, halfway between Bad Segeberg and Kiel. A northbound extension to Kiel and a southbound extension connecting to the A 39 are being planned. The A 21 will cross the extension of the A 20 near Bad Segeberg.

Exit list

StateDistrictLocationkmmiExitNameDestinationsNotes
Schleswig-HolsteinKielGaarden-Süd and Kronsburg—Kiel-Barkauer Kreuz B 76 – Eckernförde, Lübeck
B 202 – Lütjenburg, Rendsburg ( A 210)		proposed northern endpoint of motorway
—Kiel-MolfseeSchulensee
( B 202 – Lütjenburg)		Proposed junction
Planned Südspange will start here
MoorseeBridgeEisenbahnbrückeHamburg-Altona–Kiel railwayProposed bridge
—Kiel-NeumeimersdorfKiel-MeimersdorfJunction currently part of the B 404
—Kiel-WellseedammKiel-Wellsee, Kiel ElmschenhagenJunction currently part of the B 404
—Kiel-Industrieareal WellseeKiel-Industrieareal WellseeJunction proposed
Plön (district)Boksee—Boksee/HavighorstBoksee, HavighorstJunction proposed
Klein Barkau5Klein BarkauKlein Barkau, KirchbarkauJunction under construction
Löptin—transition from federal road B 404 – KielTransition from B 404
Current northern endpoint of motorway
Stolpe6NettelseeNettelsee, Plön, Bordesholm
Rest areaDepenauer MoorDepenauer MoorAccess only southbound
7WankendorfWankendorf, Stolpe
SegebergBornhöved8Bornhöved B 430 – Bornhöved, Neumünster, Plön, EutinEutin is only signed southbound
9TrappenkampTrappenkamp, RicklingRickling is only signed southbound
Daldorf10DaldorfDaldorf, RicklingRickling is only signed northbound
Negernbötel11Wahlstedt B 205 – Flensburg ( A 7 / E45), Neumünster, WahlstedtFlensburg and Neumünster are only signed northbound
SchackendorfRest areaSchackendorfSchackendorf rest area
—SchackendorfSchackendorfIncomplete Junction: Only one entrance northbound
Slip road closed in 2021
12Bad Segeberg-NordBad Segeberg, SchackendorfProposed exit
Exit will be built along the A 20 extension
BridgeStraßen- und EisenbahnbrückeNeumünster–Bad Oldesloe railway
Bad Segeberg12Bad Segeberg-Nord B 206 – Itzehoe, Lübeck ( A 20), Bad Segeberg-Nord, Bad Segeberg-Möbel KraftExit will be closed along the A 20 extension
Högersdorf13Bad Segeberg interchange A 20 – Bremerhaven, Lübeckinterchange proposed
13Bad Segeberg-Süd B 432 – Bad Segeberg-Süd, Hamburg AirportHamburg Airport is only signed southbound
Exit will be closed along the A 20 extension
Mözen14SchwisselSchwissel
SchwisselRest areaSchwisseler KampSchwisseler Kamp rest area
Neversdorf15LeezenLeezen
StormarnBad Oldesloe16Bad Oldesloe-NordNütschau, Tralau, Borstel, Bad Oldesloe-Nord
17aBad Oldesloe-Süd B 75 – Bad Oldesloe-Süd
Rümpel17bRümpelRümpelincomplete junction: only one entrance northbound
TremsbüttelBridgeStraßen- und EisenbahnbrückeLübeck–Hamburg railway
18TremsbüttelTremsbüttel
Rest AreaRehbrookRehbrook reat area
Hammoor19Bargteheide interchange A 1 / E22 – Bremen, Hannover, Hamburg, Ahrensburgincomplete interchange: no exit/entrance ramp: Kiel ↔ Lübeck,
no exit/entrance ramp: Hamburg ↔ Schwarzenbek,
no exit ramp Schwarzenbek → Lübeck
—transition to federal road B 404 – SchwarzenbekTransition to B 404
Current southern endpoint of motorway
—BargteheideBargteheide, HammoorProposed junction
Todendorf—Todendorf/MollhagenTodendorf, MollhagenProposed junction
Steinburg, Stormarn—Todendorf/SprengeTodendorf, SprengeProposed junction
Lütjensee—Lütjensee/SchönbergLütjensee, SchönbergProposed junction
Grönwohld—Lütjensee/GrönwohldLütjensee, GrönwohldProposed junction
Trittau—Trittau-NordTrittau, GroßenseeProposed junction
Grande—Trittau-SüdTrittau, GrandeProposed junction
Herzogtum LauenburgKasseburg—Schwarzenbek/Grande interchange A 24 / E26 – Hamburg, BerlinProposed interchange
Sachsenwald—Schwarzenbek-Nord B 209 – SchwarzenbekProposed junction
SchwarzenbekBridgeEisenbahnbrückeBerlin-Hamburg railwayProposed bridge
—Schwarzenbek-West B 207 – Hamburg-Bergedorf, SchwarzenbekProposed junction
Hohenhorn—Geesthacht-Nord B 5 – LauenburgProposed junction
Escheburg—Geesthacht interchange A 25 – HamburgProposed interchange
ElbeElbeElbeBridgeElbe riverElbe river bridgeProposed bridge
NiedersachsenHarburg (district)Marschacht—Marschacht-RönneMarschacht, RönneProposed junction
—Marschacht-EichholzMarschacht, EichholzProposed junction
Handorf—HandorfHandorf, RottdorfProposed junction
Bardowick—Handorf interchange A 39 – Hamburg, LüneburgProposed junction
proposed southern endpoint of motorway
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
  •       Closed/former
  •       Incomplete access
  •       Proposed
  •       Route transition

External links

  • Bundesautobahn 21 – detailed route plan (in German)
  • v
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  • e
Autobahn shield Autobahn system in Germany
Major routes
German Autobahn symbol
German Autobahn symbol
Regional
routesLocal routesPlanned or
former routes
See also
  • * original plan: number is used by another route now


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