Well, the first problem here is the fact that you use version 0.A and the strange bugs regarding roads near bridges have been tackled since then. Please test this again on an experimental build.
Yes, the plazas are intended but I think they are lame, since technically they are still road crossings, that’s why the roads go into the plaza, which looks kind of silly to me. The plazas could have been done much better in my opinion, but whatever.