I did Mt Evans,the highest paved road in North America,last June.It's 14,100 feet and at the top I thought I was gonna die.Going up we saw several guys on bicycles.I had a heart attack just watching them.And just like the road you mentioned...NO GUARD RAILS! Yikes!!
I lived in Denver for 3 years and drove up Mt Evans a few times. The first time I drove up there, it was 90 degrees in Denver, so I was wearing shorts and a t-shirt, which was fine during the day. As it got later in the day, I decided to head back down and realized I locked my keys in the car. At 14,00 feet up, it was starting to get cold and I decided to look through the ruins of the burnt-out Evans Lodge and I found a wire coat hanger and was able to unlock my car. I was about ready to break open the window with a rock!