Seriously - the most dangerous roads I've ever been on were in Texas where there were 12 lane highways, and crazy people who wanted to drive 100MPH past you in the right-hand lane, all while people are merging on and off the highway.
Doing the speed limit meant that EVERYONE was driving faster than you, which meant that you were a lot more likely to get rear-ended from someone who didn't see you in time. You have to speed to stay safe, and then you add in construction zones and it's just a death trap.