> you can take the slip roads almost everywhere but they’re slow.

We have that problem here in Germany. The roads aren't just slow - the people living in the towns these roads run through are going through hell because they are affected massively. Can't safely cross the road, emergency response vehicles take ages, an insane amount of noise and emissions (because vehicles near idle make much more toxic exhaust when at low load and thus temperature), more brake and tire dust... Austria was fed up years ago, Bavaria recently followed suit [1].

[1] https://www.adac.de/der-adac/regionalclubs/suedbayern/news/a...