The problem with Roundabouts is that drivers have to think before entering it.
If the Roundabout is two lanes,the left hand lane on most occasion's a driver can stay in that lane till he/she wishes to exit,or must exit next left if lane markings say so.
Sometimes the right hand lane can exit left as well depending on the markings on the road.
The driver in the right hand lane wishing to exit left must observe where any vehicle in the left hand lane is, and act to avoid an accident by slowing down and letting that vehicle go on round or speeding up to execute the left turn safely.
If one cannot do it safely then they should go round the roundabout once again and exit safely next time.
Also the driver in the left hand lane should observe whats going on around him/her and act accordingly to avoid an accident.
The common sense rule that a vehicle already on the roundabout has right of way,so any vehicle entering the roundabout from the left must give right of way.
Simple
Cheers
