Doubtful. The roundabouts placed in some places in the IE still had people going the wrong way and just generally not understanding how they worked. You'd need

Doubtful. The roundabouts placed in some places in the IE still had people going the wrong way and just generally not understanding how they worked. You'd need to do education along with implementation for something like that to help. Personally I doubt it would help traffic in any significant manner but who knows.