I did this quite a few years ago in West Salem on I90E.
I was coming off Mormon Coulee & I forgot a I needed to go somewhere back one exit. Right off the exit there was an emergency U-turn. I hopped over on it, watched for traffic to clear. I pulled out & gunned it, pulled 7psi through 1st & grabbed 2nd, 3rd & was up to 70 in the Stang in about 2 block lengths.
Looked back & a state trooper had followed me into the U-turn & attempted to keep up in his turdy Vic... once I slowed back down to let him catch up he came to the window & I asked, "Do I get the dumb ass of the day award?" He didn't laugh but responded, "Probably.". I then rebutted "Well if that was so dangerous for me to do, & I walked away from you like you were standing still, how dangerous was it for you to follow right after me?" He didn't laugh at that either...
Judge threw it out after I challenged it... obviously it was not "Un-Safe" for me.
Have a nice day & YMMV...