The railraoads are squealing too. Then don't pay road tax, but they own & maintain their own track, & that's expensive. I work for BNSF west out of KC, to Wellington, KS & back. Never before in my career have I been hounded & monitored more on fuel conservation. They assign each train an "HPT". (hoursepower per ton) If the train is low priority, like coal or grain, it gets 1. 0 or maybe 1. 5 HPT. Some intermodal double stack trains might get 2. 5 A super hot, late, UPS train might get 5. 0 You have to figure up total train tonnage, plus an in any dead or isolated motors, and only put enough power online to meet or stay just under HPT. They watch this closley, as well as fuel wasting train handling & braking characteristics. Black box type data is constantly gathered by our locomotives, and downloaded by radio each time it goes by a tower & then stored. If we deviate from built in parimiters in any area, it flags that event, and our Road foreman of Engines will have it on his desk before we finish the trip, so we can "review" it together. Our GE locomotivews are actually more efffecient in R-8, which is wide open, than any other setting. They would rather have three units in Run-8 most of the trip, than have a four unit consist running in the lower notches to make the same total HP & train speed. I just with they would let me have a small % of the fuel I save them in a years time.