Highway 21 (Switzerland)
| Autobahn 21 in Switzerland | ||||||||||||||||
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| Operator: | Canton of Valais | |||||||||||||||
| Overall length: | approx. 5 km | |||||||||||||||
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Course of the road
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The Swiss Autobahn 21 or Autostrasse 21 is part of the Nationalstrasse 21 and serves as a bypass road for the city of Martigny . On this section of the Swiss motorway and road network , transit traffic flows to the Grosser-St.-Bernhard-Pass or through the St.-Bernhard-Tunnel ( main road 21 / T2 ) to Italy .