Part of the reason TO go that fast is that it is so well blocked off from the highway, and the neighborhood. It doesn't equal the sketchyness of the Waterfront path, but I don't want to be going slow, or to have a flat on it. I don't think I've ever gone over 30 there, but I do try and stay well over 20.
I do disagree with the post about it having a lot of blind entrances. I can only count three entrances, besides where it intersects major roads, one where it is on the north side of the highway, and this one at 79th, and another down by SW Catherine, where it is much flatter.
At the very least, I'm in favor of the right side white line, reflectors or a hazard sign, and trimming that bush back.