@Jörgen Thanks, I look forward to testing this and hope it works for this problem. I am a bit skeptical whether these arrows will be visible enough when approaching a roundabout at speed and dealing with Italian traffic!
If you have a Android based phone, you have to wait a little longer. The release was 23 september and the last time update for android came about a fourth-night later. So in this case it will be about the second week in October I hope!