Thoughts on speed limits...

I am curious as to why driving south is so much more unsafe than driving north. For the section of I25 between exit 191 and Lincoln Ave. northbound has a speed limit of 75 and southbound has a speed limit of 55. The next three miles are 65 north and 55 south. Are the afraid that since "south" is "down" on the map, that gravity might cause people to accelerate and they might fly off when they hit the equator? Is there more wildlife on the west side of the highway? Are people leaving Denver generally worse drivers than those leaving Castle Rock? I wrote to C-DOT about this issue once several months ago and they never posted a new speed limit sign, nor did they reply to my email, so I must believe that "south" is inherently more dangerous...

The section of I25 from Orchard to exit 191 is a joke with speeds anyway. The flow of traffic is 75 for this whole stretch. And so with the new impeding traffic law, it is now actually impossible to drive legally on this stretch (a cop's dream!) - 75 is breaking one law (the more obvious, posted law) - 55 is breaking another law (and risking life and limb). So, if we can get everybody to drive 120 on that stretch, it's "legal" because it is the "flow of traffic"?

We may as well just be honest and take down all of our highway speed limits signs and post "reasonable and prudent" like they do in Montana. If nobody's going to follow them and nobody's going to enforce them, why waste the raw materials on signage?