Sundgau Plateau Countryside

Nice atmosphere in Sundgau.

Attention: this is a main road between Hésingue or the motorway feeder at the Euroairport and Ferrette. There is a corresponding amount of traffic, which also likes to travel at more than the permitted 90km/h. And the road isn't particularly wide or good for overtaking cyclists.
I strongly recommend only staying on the route for as long as absolutely necessary and preferring to take the detour via Muespach-le-Haut - which is much more attractive in terms of scenery!

@Koblinator regarding main roads: yes, but it must be made very clear that the French 1. consider and respect cyclists more than the Swiss (in my experience) and 2. therefore always drive very generously around them (changing lanes to the left). After 17 years of racing, constantly on the Swiss-French border, my clear conclusion is...F = Tour de France country...