The part of Pionirska proga that is not a cycleway is nothing now.

Not even a footpath. It's non existing. But for the part of Pionirska proga that IS a cycling lane was not recognised when making routes, ... all maps software rerouted you on Večna pot, which a road that IS NOT ALLOWED to drive with bikes.

At least now one can create a route on Pionirska železnica bike path. 

https://onthegomap.com/s/lrookqdn