The crazy thing about those signs is they are typically on paths whereby a cyclist wheeling a bike is going to take up the full width.
Exactly
When the Runcorn-Widnes bridge was closed for a year (a year is well over 36 months isn't it????) then bicycles were allowed on the walkway down the outside most of the time
it is quite narrow - OK for about 3 people in width
so a cyclist ona hybrid type bike who is walking would take up most of the width
if they (I) rode - slowly and in a reasonable manner - then they (I) could easily stop and lean against the edge as walker coming the other way passed
but the signs clearly said to walk - which was daft
there was one bloke who complained - while I was actually stopped and allowing him to pass - but I think he was the sort to complain if there was a "Y" in the day!!
everyone else just said "Thanks" and carried on