You're allowed to go as fast as you safely can on some of our roads, but even on those the flow of traffic is maybe at 130-140 km/h (80-90 mph). Sustaining 200k

You're allowed to go as fast as you safely can on some of our roads, but even on those the flow of traffic is maybe at 130-140 km/h (80-90 mph). Sustaining 200km/h in a car is very hard (extreme focus is required) and quite expensive as fuel economy drops sharply. Plus most cars can't actually do it.