Depending on which exit he left from, it's either .33 or .24 away from the exit to the start of the turn. so he gets to the turn and brakes, starts to slide and hits that dirt by the "Welcome" sign.
If he was indeed RACING as fast as he could, he'd be going 100 easily in that car. IF he was going that fast, his car would have ended up in the woods. My guess is he was going like 50. No THAT crazy for that area. He just mis judged it.
The yellow arrow is the stop sign he hit next to the "Welcome" sign.
The green arrow is where he stopped.
At REAL excess speeds? He'd be in the woods after blowing through the curb at the green arrow.
He was braking through the sign in the dirt, which he slid, so he wasn't slowing down. He came to a stop in a short distance which tells me he wasn't going over 50.