Its fortunate he didn’t flip. I keep thinking that I would have reacted and slowed down as I saw the guy pulling into the lane but conditions were wet and going into a slide would not have helped either. Hope the other person is okay as well…
People keep talking about him going fast, and this was my initial reaction too but I wanted to check so performed a few calculations after noticing some signs in the video.
- See: 42.502273, -71.233701
- The video has timestamps so you don’t even have to trust that its playback rate was not adjusted.
- To confirm google streetview shows the speed limit on the Middlesex Turnpike is 40mph.
- The distance from the Town Line sign to the start of the turn lane separator line is 1325 ft.
- The time for that distance is from 17:13:56 to 17:14:18 or ~22 seconds.
- The approximate speed is 39-41 MPH
So +/- measurement inaccuracy, etc, this guy is following the law for the non-intersection section of the road.
The real speed question is how quickly, or not, he decelerates entering the intersection. To see this you would need more sophisticated tools, which you know youtube, with its abundance of dash-cam videos, is probably working on 
