The A42 autoroute is a short motorway in France. Being completed in 1987, the road connects the city of Lyon to its junction with the A40 roughly 50 km north-east of Lyon.

• 2x2 lanes
• 2x3 lanes between Lyon and Pérouges (26 km)
• 70 km long
• Service areas

• 1983: Section between Neyron and Chazey (30 km) opened
• 1988: Section between Chazey and Pont-d'Ain (19.5 km) opened

Exit/Junction	Destination
	Lyon-Avenue Jean Mermoz Autoroute commences in Lyon City Centre
1	(Lyon: porte de Croix-Barret) Towns served Lyon Centre, Périphérique ( N 383)
1b	(Villeurbanne Croix-Luizet-St Jean) Towns served: Villeurbanne Croix-Luizet, St Jean
1a	(Vauix-en-Velin) Towns served: Vauix-en-Velin
	Exchange A42-N346 Junction with N 346 Lyon ring road to Orange south
	Exchange A42-A46 Junction with A 46 part of the Lyon ring road to Paris
4	(Parc de Miribel-Jonage) Towns served: Neyron and Miribel
5	(Beynost) Towns served: Beynost
Péage de Beynost
	Exchange A42-A432 Junction with the A 432 to Marseille
Service Area: Lyon-Dagneux/Lyon-Montluel
6	(Balan-Dagneux) Towns served: Montluel and Balan
7	(Pérouges) Towns served: Pérouges, Meximieux and Saint-Jean-de-Niost
Rest Area: Ambérieu
8	(Ambérieu) Towns served: Ambérieu-en-Bugey
9	(Pont-d'Ain) Towns served: Pont-d'Ain
	Exchange A42-A40 Junction with A 40 to Mâcon (north), Geneva (Switzerland) (east) and end of autoroute.

• A42 autoroute in Saratlas