Bundesautobahn 63 (translates from German as Federal Motorway 63, short form Autobahn 63, abbreviated as BAB 63 or A 63) is an autobahn in southwestern Germany. It connects the Mainz area to Kaiserslautern and the A 6 and is therefore an important connection between the Rhine/Main and the Saar areas. It was constructed during the 1980/90s and finished in 2004 (21 years ago) (2004): last section Sembach to Kaiserslautern.

Historically an uninterrupted Autobahn, one final 10-kilometre (6.2 mi) section was added between Sembach and Kaiserslautern at the current site of the Dreieck Kaiserslautern/KL-Zentrum Ausfahrt. This relieved the heavy traffic on the two lane Bundesstraße 40.

	(2)	Mainz-Süd 4-way interchange A 60, connection to B 40
	(3)	Klein-Winternheim
	(4)	Nieder-Olm
	(5)	Saulheim
	(6)	Wörrstadt B 420
	(7)	Biebelnheim
	(8)	Alzey 4-way interchange A 61
	(9)	Erbes-Büdesheim
		Viaduct Weinheim 1,300 m
	(10)	Freimersheim
		Rest area Heubergerhof
	(11)	Kirchheimbolanden
		Albisheim (planned)
	(12)	Göllheim
		Umbau als: parking area
		Rest area Donnersberg (planned)
		Viaduct Langmeiler Senke 205 m
		Viaduct Langmeil 276 m
	(13)	Winnweiler B 48
		Lohnsbachtalbrücke 271 m
		Viaduct Lanzenbachtal 250 m
		Viaduct Baalborner Wasser 250 m
	(14)	Sembach
		Viaduct 100 m
		Viaduct Eselsbachtal 230 m
	(15)	Kaiserslautern
	(16)	Kaiserslautern 3-way interchange A 6

• Bundesautobahn 63 – detailed route plan (in German)