I'm not sure you understand, Deals Gap is dangerous because of the numerous blind corners (of which roundabouts have none) combined with the 18-wheelers that drive in the wrong lane around said blind corners. This creates a pretty effective barrier to slam into and kill yourself.
"IOMTT, NW200, Ulster GP and the like" are sanctioned road racing events and (to the best of my knowledge) are not known for tractor trailers driving on the wrong side of the road. Yes, they are very dangerous but then again the people racing are also professionals (not sure why gunshot72 compared professional racing to weekend getaways for the average joe).
map of deaths since 2000: http://tailofthedragon.com/maps/map_deaths.pdf
trucks on the dragon: http://tailofthedragon.com/dragon_trucks.html
Posted: 28/01/2012 at 23:25