I want to map a track that runs along a stream bed for a short distance. Pictures at the bottom of this page. (This is probably NOT an intermittent stream.) Track and stream share two segments/3 nodes. At the moment I have drawn the two lines on top of each other, but JOSM complains.
when the road cross the stream, cut road where they touch the water and set ford=yes on it. this segment.
but when the road is a long part in the stream, then they use the same way, the water and highway is both on the way tagged, and also ford=yes some places i use intermittent=yes.
I have made my own preset in JOSM to that that quicky.