[jnovacho]

Yep, in my city we have a roundabout with 4 cardinal directions, roughly aligned with compass directions.

The West connection is to/from highway, so it has most traffic. People arriving from North/East/South want to leave on the West. And this causes massive jams, as the constant supply of traffic going from South entry to the West exit (i.e. doing left turn, and passing all ramps) essentially blocks all the other traffic.

Roundabout are great, they increase safety of dangerous intersections. But sometimes a controlled intersection is just a better idea.