Couldn’t you just create dedicated tags for the individual directions of the lanes? https://wiki.openstreetmap.org/wiki/Key:maxspeed mentions this in the Lanes section.

@sven @openstreetmap I think the tagging you’re showing *should* be fine, but as I think the :forward and backward tags aren’t as widely supported I’d put the lower speed as a generic maxspeed for that bit of road as well. That way simple software will default to the lower limit and more sophisticated software will use the correct one.

I plan to map it with the in-between zone tagged with separate maxspeed:forward and maxspeed:backward tags.

Maybe it would be better to use the lower speed limit in the “no-man’s land”, since it would be unfortunate to be driving too fast while thinking one is folliwing speed limit. I assume it’s kind of ambigous what the allowed speed limit is?

For mapping, I agree with your logic. I just think we should err on the side of causion when things are ambigous.

Interesting. I just found this instruction. I’m guessing you already did too. (Source)

For speed limits depending on the way direction, see maxspeed:forward=*.

So I would say, map that section of road with forward/backward speeds. Also, the signs should be independent nodes.

The position of the actual speed limit signs can be added as nodes beside the road/railway/waterway