Indeed. Peds are more likely to use a cycle path/track as a "glorified footpath" than a road.
Probably down to the fact that there are 1 tonne+ objects traveling at 30, 40 or even 50mph regardless of the speed limit/ped-risk.
My problem, is that although (IMO) I can safely travel at 30mph along that stretch, if I were to take the smoother road (which I do during quiet periods) I would have cars breaking the speed limit to pass me while I'm doing 30-35mph, just so they can beat me to the RAB.
TBH, I would rather risk having to slow down if I see peds on the cycletrack.
Edit : Re-reading your post, I could also argue that 18-20mph is closer to the walking speed of a ped, than the average speed a motorist will travel on the adjacent road.
