<P> So - called `` modern '' roundabouts require entering traffic to give way to traffic already in the circle and optimally observe various design rules to increase safety . Compared to stop signs , traffic signals , and earlier forms of roundabouts , modern roundabouts reduce the likelihood and severity of collisions by reducing traffic speeds and minimizing T - bone and head - on collisions . Variations on the basic concept include integration with tram and / or train lines , two - way flow , higher speeds and many others . </P>
<P> So - called `` modern '' roundabouts require entering traffic to give way to traffic already in the circle and optimally observe various design rules to increase safety . Compared to stop signs , traffic signals , and earlier forms of roundabouts , modern roundabouts reduce the likelihood and severity of collisions by reducing traffic speeds and minimizing T - bone and head - on collisions . Variations on the basic concept include integration with tram and / or train lines , two - way flow , higher speeds and many others . </P>
who has right of way in round about
who has right of way in round about
traffic already in the circle
traffic already in the circle