I followed back the first link for the opposite direction of travel and didn’t find any signage before the swing-gates. You kinda truck along at 45mph+, sticking to the left to continue and with a small amount of notice time, you need to fork to the right.
I get that a local would know you are to always fork to the right, but someone unfamiliar or a machine could be confused by the initial half barriers, with only a 2 lane wide barrier after the demarcation point. Along with the oddly painted lanes.
But as I said in another post, I guess DOT would have the data on incidents (and hopefully act on it if there’s enough evidence in favour of more safeguards).