Bundesautobahn 42 (translates from German as Federal Motorway 42, short form Autobahn 42, abbreviated as BAB 42 or A 42) is an autobahn in western Germany. It connects Kamp-Lintfort with Castrop-Rauxel, linking several large cities in the Ruhr area, such as Dortmund, Duisburg, the North of Essen and Gelsenkirchen. It is colloquially known as Emscherschnellweg, after the river Emscher, which it roughly follows. Construction went underway in the 1970s and 1980s.

	(1)	Kamp-Lintfort 4-way interchange A 57 E31 B 528
	(2)	Moers-Nord
	(3)	Duisburg-Baerl
		Beeckerwerther Brücke 1030 m
	(4)	Duisburg-Beeckerwerth
	(5)	Duisburg-Beeck
		Hochstraße 390 m
		Straßenbrücke 120 m
	(5)	Duisburg-Beeck
		Bahnbrücke 60 m
		Hochstraße 320 m
	(6)	Duisburg-Nord 4-way interchange A 59
	(7)	Duisburg-Neumühl
	(8)	Oberhausen-West 4-way interchange A 3 E34 E35
	(9)	Oberhausen-Buschhausen
		Straßenbrücke 80 m
		Emscherbrücke 510 m
	(10)	Oberhausen-Zentrum A 516 B 223
	(11)	Oberhausen-Neue Mitte
	(12)	Bottrop-Süd
		Emscherbrücke 430 m
		Rhein-Herne-Kanal 590 m
	(13)	Essen-Nord B 224
	(14)	Essen-Altenessen
	(15)	Gelsenkirchen-Heßler
	(16)	Gelsenkirchen-Zentrum
	(17)	Gelsenkirchen-Schalke
	(18)	Gelsenkirchen-Bismarck
		Hüller Bach 50 m
	(19)	Herne-Wanne
		Straßenbrücke 50 m
	(20)	Herne-Crange B 226
	(21)	Herne 4-way interchange A 43
	(22)	Herne-Baukau
	(23)	Herne-Horsthausen
		Bahnbrücke 50 m
	(24)	Herne-Börnig
		Rest area Holthauser Bruck/Lussebrink
	(25)	Castrop-Rauxel-Bladenhorst
	(26)	Castrop-Rauxel B 235
	(27)	Castrop-Rouxel-Ost 4-way interchange A 45 E41
	(27)	Dortmund-Bodelschwingh

• Bundesautobahn 42 – detailed route plan (in German)