The more I read into it the more I think I might by-pass Switzerland altogether! What a PITA is seems.
Cheers for the HiVis in the car, didn't know that. It is in the cargo net in the boot at the moment.
I have to say when we drove down to Italy for the Mille Miglia in May we never has high visability jackets, specials bulbs, GB stickers, masking our headlights etc etc
Search our trip - GTV at Rheims Circuit
We drove the GTV from France through Switzerland and onto Italy and all the way back with not a slightest issue.
In fact it was only at Calais on the way home !! that we even had to show our passport.
Were we lucky. Some might say yes but in four trips to Europe this year in France, Germany Switzerland and Italy never once had an issue with any of this
I did have a triangle borrowed from an Audi but tucked it away in the GTV boot for the whole trip!
Same applies all last year too in the various trips (pleasure and business ).
And I had my Roadangel bang in front stuck on the screen and no one said a word.
Enjoy the trip.
Have fun and drive through the Alps and Switzerland