A43 autoroute
Autoroute de la Maurienne
Route information
Part of E70
Maintained by AREA/SFTRF
Length	208 km (129 mi)
Existed	1973–present
Major junctions
West end	Lyon
East end	Tunnel du Fréjus
Location
Country	France
Highway system
Roads in France Autoroutes Routes nationales

The A43 autoroute, also known as l'autoroute alpine and l'autoroute de la Maurienne, is a motorway in France. Travelling through the French Alps, the road connects the city of Lyon with the Tunnel du Fréjus, near Modane, which passes the Italian border towards Turin. The autoroute opened in phases as it was constructed between 1973 and 1998.

• 2×2 lanes
• 2x3 lanes between the Boulevard Périphérique in Lyon, the A46 and the A48 (34 km)
• 2×4 lanes between the A46 and the A432 (7 km)
• 4+3 lanes between the A432 and the toll barrier at Saint-Quentin-Fallavier (7 km)
• 208 km long
• Service areas

• 1973: Opening of the section between Lyon and Bourgoin-Jallieu.
• 1974: Opening of the section between Bourgoin-Jallieu and Chambéry.
• 1990: Widening of the road to 2x3 lanes between Saint-Quentin-Fallavier and the junction with the A48.
• 1991: Opening of the L'Epine Tunnel.
• 1991: Opening of section between Montmélian (A41) and Aiton. The section previously numbered A41 between Chambéry and Montmélian was re-numbered the A43.
• 1996: Opening of section between Aiton and Saint-Jean-de-Maurienne.
• 1998: Opening of section between Saint-Jean-de-Maurienne and Saint-Michel-de-Maurienne.
• 2000: Opening of section between Saint-Michel-de-Maurienne and Freney, and the incorporation of the N566 approach to the Fréjus Tunnel.
• 2002: Completion of Junction 11.
• 2004: Completion of Junction 20.

This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. Please consult this guideline for information on how to create one. Please improve this article if you can. (December 2021)

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Exit/Junction	Destination
	Lyon-Avenue Jean Mermoz Autoroute commences in Lyon City Centre.
1	(Boulevard Pinel) Towns served: Lyon
	Exchange A43-N383 (Boulevard périphérique) N 383 Towns served: Lyon
2a	(Bron Parilly) Towns served: Lyon
2	(Bron Rebufer) Towns served: Lyon
3	(Porte des Alpes) Towns served: Lyon
4	(Le parc technologique-Bron Aviation) Towns served: Lyon
	Exchange A43-N346-A46 Junction with N 346 to Paris and A 46 to Marseille
Rest Area: St-Priest/Manissieux
	Exchange A43-A43 Junction with A 432 to Aéroport Lyon St-Exupéry and Strasbourg
5	(L'Isle-d'Abeau Chesnes-Heyrieux) Towns served:Heyrieux
Péage de Lyon St Quentin Fallavier
6	(Villefontaine-La Verpillière) Towns served: Villefontaine
Service Area: L'Isle-d'Abeau
7	(L'Isle-d'Abeau centre) Towns served: L'Isle-d'Abeau
8	(Bourgoin-Jallieu) Towns served: Bourgoin
Rest Area: Le Vernay/Coiranne
	Exchange A43-A48 Junction with A 48 to Grenoble and Marseille
9	(La Tour-du-Pin) Towns served: La Tour-du-Pin
Rest Area: Les Marouettes/Les Sitelles
10	(Chimilin-Les Abrets) Towns served: Chimilin-Les Abrets
Rest Area: Romagnieu/Le Guiers
11	(Belmont-Tramonet-St-Genix-sur-Guiers) Towns served: Belmont-Tramonet
Rest Area: Le Lavaret/L'Omble
12	(Lac d'Aiguebelette) Towns served: Lac d'Aiguebelette
	Exchange A43-A41 Junction with A 41 to Annecy
12a	(Chambéry-nord) Towns served: Chambéry
	Exchange A43-N201 The autoroute becomes the N 201 through Chambéry
	Exchange N201-A43 The autoroute re-commences
20	(St-Baldoph-Challes-les-Eaux) Towns served: St-Baldoph-Challes-les-Eaux
Service Area: Le Granier/L'Abis'
Péage de Chignin
21	(Chignin-Les Marches) Towns served: Chignin-Les Marches
	Exchange A43-A41 Junction with the A 41 to Grenoble
22	(Montmélian) Towns served: Montmélian
Rest Area: Val Gelon/L'Arcluzaz
23	(St Pierre-d'Albigny) Towns served: St Pierre-d'Albigny
	Exchange A43-A430 Junction with the A 430 to Albertville
24	(Aiton) Towns served: Aiton
Rest Area: St Pierre-de-Belleville (southbound)
25	(Epierre) Towns served: Epierre
Rest Area: St-Léger (northbound)
26	(La Chambre) Towns served: La Chambre
Rest Area: Ste-Marie-de-Cuines/St-Avre
27	(Hermillon-St-Jean-de-Maurienne) Towns served: St Jean-de-Maurienne
28	(St Julien-Montdenis-St Jean-de-Maurienne) Towns served: St Jean-de-Maurienne
Service Area: St Julien-Montdenis (northbound)
Service Area: 'Rieu Sec (Petrol only) (southbound)
29	(St Michel-de-Maurienne) Towns served: St Michel-de-Maurienne
Péage de St Michel-de-Maurienne
Autoroute becomes single lane.
30	(Le Freney-Modane) Towns served: Le Freney-Modane
31	(Valfréjus) Towns served: Valfréjus
Péage - Tunnel du Fréjus
Road enters tunnel re-emerging as the A 32 in Italy towards Turin.

• A43 autoroute in Saratlas