Here the tollway speed limits are 55 within the Chicago metro area, but they usually move anywhere from 70-90; typically 75-80.
They don't typically enforce the max unless you're being crazy about it, but for all of those pokey Wisconsin drivers, they do give them tickets for going under the minimum of 45.
220.5mph... That would be a heck of a speed limit. I'd do it! Too bad it'd never happen. 85; that's cool!
It'd keep all of the Prius and Civic drivers off of the road.