Re: "There are over 200 roads that cross the border."
"There are 135 external borders to the EU. France/Germany/Austria/Italy and Switzerland are all in Schengen, so it is only a customs border rather than a full border. Same at Italy->Vatican City or Italy->Andorra."
The EU has land borders with Belarus, Russia, Ukraine, Turkey, Albania, Serbia, Macedonia, Kosovo, Bosnia. There must be thousands of roads crossing from EU/Schengen to non-EU/Schengen countries.
I suspect that it might be true there are 135 external CUSTOMS borders of EU/Schengen, there will be many more road crossings without customs posts.
Otherwise... citation needed