The right of way regulations. Traffic inside the circle does not have the right of way, sometimes, but then sometimes it does. Every continous line in there marks a "you have to stop for incoming traffic".
It's most easily seen if you're approaching on the leftmost lane from the South-West. Following the markings, you may only exit to the South East or the south. Or be stuck in an indefinite loop.
The right of way regulations. Traffic inside the circle does not have the right of way, sometimes, but then sometimes it does. Every continous line in there marks a "you have to stop for incoming traffic".
It's most easily seen if you're approaching on the leftmost lane from the South-West. Following the markings, you may only exit to the South East or the south. Or be stuck in an indefinite loop.