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| Grand Western Bypass of Strasbourg | |
 The A355 motorway inKolbsheim | |
| Route information | |
| Length | 24 km (15 mi) |
| Existed | December 17, 2021 (2021-12-17)–present |
| Major junctions | |
| South end |  A 35 and A 352 toDuttlenheim |
| Major intersections |  D 1004 toIttenheim |
| North end |  A 4 andA 35 toVendenheim |
| Location | |
| Country | France |
| Regions | Grand Est |
| Departments | Bas-Rhin (Collectivité européenne d'Alsace) |
| Major cities | Strasbourg |
| Highway system | |
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TheA355 autoroute, known as the "grand western bypass" or "western bypass of Strasbourg" (GCO), is a motorway that bypassesStrasbourg from the west through theKochersberg. With a length of 24km, it connects the junction between the A4 and A35 motorways to the north of Strasbourg to the junction between theA35 and the A352 to the south.[1]
