In the latest Railway Age June 2012 issue is an article with the above title.
Basically its a system developed by New York Air Brake incorporating GPS, PTC, and on board smart computers and sensors, touted to reduce fuel consumption and improve train handling by providing information on track profile, in train forces, and optimal throttle and dynamic brake control prompts. It gives railroads the ability to capture and analyze operational data top find the best train handeling practices. The goal is to achieve the much desired "Golden Run", a combination of optimmal fuel economy, well managed in train forces and schedule compliance within the parameters of operating rules. One component is the electronic air brakes for each car to achieve controlled stops rather than air brakes applying one car after another domino style. The system is deployed on 1000 Norfolk Southern engines.
Will be interesting to see if other RR adopt this. It is cost justified for RR with alot of hills, sags and curvey track, rather than the Nebraska flat coal drag runs.
(Tongue in cheek):
Whats to know about train handling:
To go, slam throttle into run 8 and cross your fingers drawbars hold. To stop, big hole the air and grab your seat until all the slack run in action stops. Simple 
(Tongue out of cheek)
