Man I wish our MUP (only been in existence 2 years) had some lane markings like that. Can't stand walkers and bikers taking up almost the whole width going in one direction.
Although one time I was in a group of over 100 recreational riders and we all piled onto the MUP for one stretch (on at one cross street, off at the next, maybe 1/2 mile). The walkers and cyclists we encountered not in the group all seem genuinely amazed at the size of the group.