That is madness.
They upped ours to 70 and few there are, who can expertly drive at those speeds.
No idea why everyone’s in such a damnfool hurry.
Down here on that "Austin Autobahn" & the interstate, the 'slow traffic keep right' advisory really comes in to play. People who are meeting or exceeding the speed limit can zip on by on the left, though if you encounter someone who is more on the slower side than you like, you really have to be extra careful before you make your move over to the left to pass. Certainly not for the uninitiated or careless.