According to the Bureau of Transportation Statistics, Montana’s roads aren’t as bad as those in a lot of other states. Where Montana’s Roads Rank NationallyThe Bureau looks at what percentage of roads are overall considered acceptable in their rankings. Montana’s percentage of acceptable roads is less than that of our neighbors. South Dakota has 95.10% of its roads rated acceptable, while Wyoming has 94.8%, Idaho has 93.77%, and North Dakota has 93.33% of overall acceptable roads. Top 5 Hazardous and Deadly Roads in Montana Here's a list of the most dangerous roads in Montana.