Roads are rendered really "fat"

I am noticing that on the rendered map, roads are rendered as really thick lines, which makes complicated intersections in cities look pretty ugly unless you reaaally zoom in on them. For example, I am working on this area

You cannot really even see all the roads as separate roads although the two motorway links (in between the tunnels) to the west of the square are actually drawn 10 meters apart. To the east of the square it is even more of a mess...

Since we create OGF maps for enjoyment and aesthetic beaty, my question is: How do you deal with this?

Have I drawn this way too small? Or should I just ignore it?