Dangerous Colorado Highway. CDOT spends an average of $2 million per year on U.S. 550 between Durango and Ouray. Between 2005 and 2015,, there were 412 accidents between mile marker 52 (at the base of Coal Bank Pass) and mile marker 92 at Ouray. Sixty-six accidents involved injuries, and eight brought fatalities. Surviving one of the “World’s Most Dangerous Roads” is relatively simple, “Know the conditions, (obey) the speed limit. Information from internet article. | San Juan Mountains Photograp