The street outside my house is torn up right now, as the City of Fort Collins pursues four different projects, including replacing sewers and gas mains. Lots of heavy equipment, but surprisingly little noise—except for one all-pervasive irritant: those back-up beeps. I had never realized before how much time those diggers and dozers and pourers and lifters and carriers spend backing up! Forward a little, then back, beep beep beep, then forward a little more, then back, be