200mph on rural highways with very light traffic in good weather conditions is very safe, especially once you're in the Midwest.
Except that rural Midwest highways are poorly maintained, often sport farm implements or "casual" drivers traveling at fractions of the speed limit, animals, people (little/no margins), have silly notions like direction changes--up/down, left/right in varying degrees. Not to mention that the vehicles on rural roads tend to be driven by the locals, of whom tend not to possess vehicles designed and/or maintained to safely exceed 70MPH let alone double, if not triple that.
Besides our interstates were designed for safe travel at 120-130mph based on 1960s vechicle technology
Citation required. Also does not account for traffic. Hard to get many people to travel as fast as existing speed limits let alone faster.