Can browse the turn restriction at osm.org/browse/relation/22627

There's a wiki page on how to create turn restrictions with JOSM
osm.wiki/index.php/JOSM_Relations_and_Turn_Based_Restrictions

The existence of the divider means that we can't physically turn right anywhere along the road. Making it a single way will make routing software assume that we can make a turn if the intended target is on the other side of the road. If we know there's a divider I'd prefer if we split the road to prevent incorrect suggestions by routing software. You don't want to be driving behind some guy who suddenly decides to turn right on a divided ways, do you?

Turn restrictions are handled by relations and I haven't actually quite grasp the idea on how to tag them. Now that Liosha's osm2mp v0.52 has some support of it I might do some experiment and see how it got generated by mapcenter2. You can also have a go at it, and give me a shout if mapcenter2's maps need to be updated.

Thanks for the clarification. Osmarender correctly displays the author of the ways.