@VLD319 when I was last in this bit of Manchester I crossed the M60 not at this interchange but at the one to the east.  I can assure you that there the cycleways are all multi-use.
"foot" access in OSM should reflect legal access, and what Pete Owens says above is correct.  If there is on-the-ground signage that says that a cycleway is cycle only then foot=no is correct, but if there isn't, it isn't.
