But this is the advantage of a small country with many people. Good infrastructure.
There are also a few cities where speed limits drop below a 100 when passing through. That is about health. Specifically noise and fine particles.
None of this is about greenhouse gasses.
Funnily enough the Netherlands is also a tax haven but it's only for large megacorporations, not people. They wouldn't be based there at all if it wasn't for the tax benefits so they don't lose out by offering it, they just screw the rest of Europe over by allowing companies to evade taxes in the whole EU.
I remembered having them a lot in my childhood, but not in recent 10 years. If a road is closed totally there usually something beyond paving going on.
It does rain a good amount in the populated parts of Australia so water shedding is one part, and resistance to temperature changes is another. The myths are true though, it does sometimes melt under high heat and heavy load.