Freight Railroads Are Being Transformed by the Digital Revolution - WSJ.com
The digital revolution is coming to freight rail. Major railroads are installing digital communications, global positioning receivers, sensors and computerized controls on their trains and tracks. New systems can gather intelligence on locations, size and speeds of trains and make automated decisions about when the trains should stop or go. Digital cameras and microphones on the tracks are working on monitoring train conditions to determine when equipment needs to enter a shop for maintenance.