Speeding test track

I remember from my youth that on some Formula 1 circuits you can pay quite a sum of money in order to try to break you car´s speed limit.
Suwarah could be a tourist hotspot with a three lane speedway for 20 kilometers. No speed limit (or somethin glike that...), no police, no cars. The tarmac survived the last two years-no wonder, it was built by the Austrian construction company Strabag. Once you have a highway build by that company, you can leave it alone for at least twenty years.
Too bad that my car has a speed break at 120 km/h.