One shipper claims the efficiency of “Precision railroading” is “doing less with less and not charging less.” But there have been benefits: Norfolk Southern, using lean techniques, has reduced dwell time in its terminals by 20%, and Union Pacific claims that Precision railroading helped clear some gridlock earlier in the year. The stock market spoke angrily: shares of rail companies like NS and CSX fell significantly in mid-July…as freight volume declined.