Bundesautobahn 21

A 21
Bundesautobahn 21
Route information
Length	50 km (31 mi)
Location
Country	Germany
States	Schleswig-Holstein,Lower Saxony(planned)
Highway system
Roads in Germany Autobahns List Federal List State E-roads
←A 20 →A 23

Bundesautobahn 21(translates fromGermanasFederal Motorway 21,short formAutobahn 21,abbreviated asBAB 21orA 21) is anautobahninGermany.

It runs from an interchange with theA 1atBargteheidetoWankendorf,halfway betweenBad SegebergandKiel.A northbound extension toKieland a southbound extension connecting to theA 39are being planned. The A 21 will cross the extension of theA 20nearBad Segeberg.

Exit list

State	District	Location	km	mi	Exit	Name	Destinations	Notes
Schleswig-Holstein	Kiel	Gaarden-Süd and Kronsburg			—	Kiel-Barkauer Kreuz	B 76–Eckernförde,Lübeck B 202–Lütjenburg,Rendsburg(A 210)	proposed northern endpoint of motorway
					—	Kiel-Molfsee	Schulensee (B 202–Lütjenburg)	Proposed junction PlannedSüdspangewill start here
		Moorsee			Bridge	Eisenbahnbrücke	Hamburg-Altona–Kiel railway	Proposed bridge
					—	Kiel-Neumeimersdorf	Kiel-Meimersdorf	Junction currently part of the B 404
					—	Kiel-Wellseedamm	Kiel-Wellsee, Kiel Elmschenhagen	Junction currently part of the B 404
					—	Kiel-Industrieareal Wellsee	Kiel-Industrieareal Wellsee	Junction proposed
	Plön (district)	Boksee			—	Boksee/Havighorst	Boksee,Havighorst	Junction proposed
		Klein Barkau			5	Klein Barkau	Klein Barkau,Kirchbarkau	Junction under construction
		Löptin			—	transition from federal road	B 404–Kiel	Transition from B 404 Current northern endpoint of motorway
		Stolpe			6	Nettelsee	Nettelsee,Plön,Bordesholm
					Rest area	Depenauer Moor	Depenauer Moor	Access only southbound
					7	Wankendorf	Wankendorf,Stolpe
	Segeberg	Bornhöved			8	Bornhöved	B 430–Bornhöved,Neumünster,Plön,Eutin	Eutin is only signed southbound
					9	Trappenkamp	Trappenkamp,Rickling	Rickling is only signed southbound
		Daldorf			10	Daldorf	Daldorf,Rickling	Rickling is only signed northbound
		Negernbötel			11	Wahlstedt	B 205–Flensburg(A 7/E45),Neumünster,Wahlstedt	Flensburg and Neumünster are only signed northbound
		Schackendorf			Rest area	Schackendorf	Schackendorf rest area
					—	Schackendorf	Schackendorf	Incomplete Junction: Only one entrance northbound Slip road closed in 2021
					12	Bad Segeberg-Nord	Bad Segeberg,Schackendorf	Proposed exit Exit will be built along the A 20 extension
					Bridge	Straßen- und Eisenbahnbrücke	Neumünster–Bad Oldesloe railway
		Bad Segeberg			12	Bad Segeberg-Nord	B 206–Itzehoe,Lübeck(A 20),Bad Segeberg-Nord,Bad Segeberg-Möbel Kraft	Exit will be closed along the A 20 extension
		Högersdorf			13	Bad Segeberginterchange	A 20–Bremerhaven,Lübeck	interchange proposed
					13	Bad Segeberg-Süd	B 432–Bad Segeberg-Süd,Hamburg Airport	Hamburg Airport is only signed southbound Exit will be closed along the A 20 extension
		Mözen			14	Schwissel	Schwissel
		Schwissel			Rest area	Schwisseler Kamp	Schwisseler Kamp rest area
		Neversdorf			15	Leezen	Leezen
	Stormarn	Bad Oldesloe			16	Bad Oldesloe-Nord	Nütschau,Tralau,Borstel,Bad Oldesloe-Nord
					17a	Bad Oldesloe-Süd	B 75–Bad Oldesloe-Süd
		Rümpel			17b	Rümpel	Rümpel	incomplete junction: only one entrance northbound
		Tremsbüttel			Bridge	Straßen- und Eisenbahnbrücke	Lübeck–Hamburg railway
					18	Tremsbüttel	Tremsbüttel
					Rest Area	Rehbrook	Rehbrook reat area
		Hammoor			19	Bargteheideinterchange	A 1/E22–Bremen,Hannover,Hamburg,Ahrensburg	incomplete interchange: no exit/entrance ramp: Kiel ↔ Lübeck, no exit/entrance ramp: Hamburg ↔ Schwarzenbek, no exit ramp Schwarzenbek → Lübeck
					—	transition to federal road	B 404–Schwarzenbek	Transition to B 404 Current southern endpoint of motorway
					—	Bargteheide	Bargteheide,Hammoor	Proposed junction
		Todendorf			—	Todendorf/Mollhagen	Todendorf,Mollhagen	Proposed junction
		Steinburg, Stormarn			—	Todendorf/Sprenge	Todendorf,Sprenge	Proposed junction
		Lütjensee			—	Lütjensee/Schönberg	Lütjensee,Schönberg	Proposed junction
		Grönwohld			—	Lütjensee/Grönwohld	Lütjensee,Grönwohld	Proposed junction
		Trittau			—	Trittau-Nord	Trittau,Großensee	Proposed junction
		Grande			—	Trittau-Süd	Trittau,Grande	Proposed junction
	Herzogtum Lauenburg	Kasseburg			—	Schwarzenbek/Grandeinterchange	A 24/E26–Hamburg,Berlin	Proposed interchange
		Sachsenwald			—	Schwarzenbek-Nord	B 209–Schwarzenbek	Proposed junction
		Schwarzenbek			Bridge	Eisenbahnbrücke	Berlin-Hamburg railway	Proposed bridge
					—	Schwarzenbek-West	B 207–Hamburg-Bergedorf,Schwarzenbek	Proposed junction
		Hohenhorn			—	Geesthacht-Nord	B 5–Lauenburg	Proposed junction
		Escheburg			—	Geesthachtinterchange	A 25–Hamburg	Proposed interchange
Elbe	Elbe	Elbe			Bridge	Elbe river	Elbe river bridge	Proposed bridge
Niedersachsen	Harburg (district)	Marschacht			—	Marschacht-Rönne	Marschacht,Rönne	Proposed junction
					—	Marschacht-Eichholz	Marschacht,Eichholz	Proposed junction
		Handorf			—	Handorf	Handorf,Rottdorf	Proposed junction
		Bardowick			—	Handorfinterchange	A 39–Hamburg,Lüneburg	Proposed junction proposed southern endpoint of motorway
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Closed/former Incomplete access Proposed Routetransition

External links

• Bundesautobahn 21 – detailed route plan(in German)