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German roads are built very well indeed. If you're a US citizen, come to Germany and you'll find like you've travelled 20 years into the future. The tarmac is much better, signs reflect much better, it all feels much better maintained.

Then again, Germany is a tiny country compared to the US. Of course you can build expensive roads if you don't have to build long roads.

By the way, if you drive from Germany to Austria, you'll get that feeling again: they spend even more money per km of highway; it's again a significant step up.