From deep in right field... turn the Interstate Highway system maintenance over to the Army Corps of Engineers. Pure interweb speculation, no facts to back it up, but I'd be willing to bet that there are countless pieces of heavy road building equipment sitting idle, to eventually to be sold at auction for pennies on the dollar, at any number of Army/Navy SeaBee's/Marine reserve depots. Maintaining the current Interstate network and utilizing this equipment, would be an awesome training ground for the engineer's, and do the public good! Eliminating a minimum of 50 different government(state) organizations currently maintaining the Interstates almost has to be a money saver on it's own.
<donning flame suit> Friendly debate, but mod's may want to move this thread to the Pub.