I understand there are other important issues. Please consider this as an extra-credit work.
One of the least pleasant thing we see in highway is the road-construction sign pointing you to detour sign. Those detour sign in turn keeps you running around loops to who knows where. I may be able to recall few horror stories from those detour signs. How does it feel like? It's like someone turned you into a hamster and then placed into a spinning treadmill. The traffic in this country is becoming the traffic of a developing nation. Why can't we have highways on top of existing highways (2nd floor)? If the construction crew needed to fix 1st floor then they can divert traffic to 2nd floor. I wonder if anyone manages to insert this one in the upcoming fiscal-cliff negotiation process...