that Lost? one looks like "The magic Mushroom" series of roundabouts in Swindon, England and believe me you, they work just fine, i know i have been thru them umpteen times before.
Really? it looks a bit scary like that on that pic. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> But they seem to drive on the left side so it might not be in England on this pic. In any case, a traffic jam in this must be quite of a hell!