text: I've also cycled on this highway, though normally drive. There is no marked cycle lane (to my memory), but bicycles are permitted on this section of the 99. In fact it is necessary to cycle on the 99 if cycling between Vancouver and Squamish.
  
  It was me who added the bicycle=yes tag, that I suspect prompted this question. I did it because the routers (graphhopper, and another, I think) assume that it's not possible to cycle on highway=motorway, and were routing via 100s of extra km, on logging roads, or returning an error.
  
  I believe the bicycle=yes tag is appropriate, as it accurately represents the situation. Something indicating more support for bicycles (bicycle=designated, cycleway=lane, etc) would be inaccurate.