I have recently got into mapping traffic signs and speed limits where I can, but I realised I don't know what to do when mapping differing speed limit signs that are offset from each other. It's a transition from a 50km/h zone to a 60km/h zone but the signs are offset by 65m, making a sort of "no-mans land" in-between. I plan to map it with the in-between zone tagged with separate maxspeed:forward and maxspeed:backward tags. I assume it should be done this way because as a driver on the ground I would follow the speed limit signs on my side of the road as I passed them, having no knowledge of the reverse sign.
I guess I'm wondering if this is a logical way to map this?
The speed limit need not be the same for each direction of travel. The speed limit changes at the sign. There is no expectation that the signs be at the same road stationing for opposing traffic. If the open street map database can't handle that appropriately, then there is no correct way to map this situation.