[Tagging] RFC - obligatory usage - bicycle=obligatory

[Martin Koppenhoefer]

> Am 28.03.2015 um 21:22 schrieb Simon Poole <simon at poole.ch>:
> 
> (nearby road
> surfaces are already "nearby" in OSM data)


in the case of several roads or different elevation (eg one of the ways on a steep hill separated by a retaining wall) it might still be very difficult or impossible to come to the correct conclusions just by analyzing a 2D projection of the situation

These are surely very, very few exceptions, just wanted to mention that an explicit way is  explicit while a spatial analysis in this case is an heuristic approach.

cheers 
Marti