It's not there, and I don't think it's ever been there, but it probably should be.
IME some editors are too "unsplit-happy", probably because the Wiki isn't quite clear enough, or at least isn't firm enough about it. For example, it should be clarified that a road should remain split if any of those criteria are met; i.e., it's an OR list, not an AND list.
Also I know we're pretty far dug in at this point but the term "split" itself bugs me. Nowhere is such a road called this. It's a "divided" road.
IME some editors are too "unsplit-happy", probably because the Wiki isn't quite clear enough, or at least isn't firm enough about it. For example, it should be clarified that a road should remain split if any of those criteria are met; i.e., it's an OR list, not an AND list.
Also I know we're pretty far dug in at this point but the term "split" itself bugs me. Nowhere is such a road called this. It's a "divided" road.
Re: [Update] Best map editing practice: split road guidance