OpenGeofiction

I’ve been doing Luciano’s mapper challenge for this month, focusing on the city of Kanton.

The university campus: http://opengeofiction.net/#map=18/52.10895/110.98005

The old factory area near the station, now mostly apartments and the museum and cultural centre, although the piano factory still operates: http://opengeofiction.net/#map=17/52.10193/111.00635

Here we can see an out-of-town shopping centre, and a large complex of test tracks for certifying cars and transport research: http://opengeofiction.net/#map=14/52.1567/110.9462

And the medieval island and cathedral: http://opengeofiction.net/#map=17/52.10625/110.99134. Many touristic buildings exist here, like the old bishop’s palace, the Old School, the st Clair pensioner’s home, the cathedral library and choristers’ school and the old town hall. There are plenty of watering-holes for the tourists. Are the medium-sized buildings (eg those on Domkatu) about the right size for wealthy merchants’ houses?

I want to put a ‘no straight on’ or ‘must turn right’ turn restriction on the junction of Saarkatu and Säntjanas Õt, but the only way I can see to do this is to create a multipolygon relation, which seems bizarre. I see this symbols quite often in OSM so I know they can be created.