It fits right in the middle for Autobahn, so in this case I assume 2 lanes each way (with a third at the right for emergency stops), controlled access, no major

It fits right in the middle for Autobahn, so in this case I assume 2 lanes each way (with a third at the right for emergency stops), controlled access, no major earthworks, and either steel or steel-reinforced concrete center and side barriers. Also including some trees or brush either side to shield noise and, presumably, also side winds. Depending on curves, it would be rated between 120 km/h and ~200 km/h (though anything above 130 km/h seem to be declared as "no limit", deferring to the motorist's judgement).