I can tell you from the street signs that the cycleways are in fact one way. Two way cycle paths are very rare, especially over longer distances, when there are cycle paths on both sides. (For reference, new one-way cycleways are built 2-3m wide, and two way 3-6m).
Driving on the roadway where there are marked cycle paths is not allowed, thus bicycle=use_sidepath when the cycle path is drawn in separately.