Yesterday morning, I was watching trains on the CSX, ex-NC&StL line going through Smyrna, TN at milepost 25, which is close to the Nissan plant yard. I saw a southbound autorack train. Nothing unusual about that except the engine consists. There were two BNSF units, one CSX unit and a G&W unit. The G&W unit was a four axle GM diesel, something like a GP-38. I was not close enough to get the road number. Here's my question; Is there some sort of pool power arrangement between CSX and G&W now? This is the first unit like this I have ever seen around here. It was raining and the light was bad so I did not have my camera, just watching that day.
From Trains Magazine 2017
“Motive power sharing among Class I railroads has been a common sight for 40 years. Pooled power agreements, often called “run-through power,” streamline the interchange process.
Railroads are able to exchange trains without exchanging locomotives, which saves time and money. These arrangements are usually billed by the horsepower hour, meaning railroads pay for the power of a given locomotive for the time it is used. Sometimes, when the train reaches its destination, the power is used for other jobs by the receiving railroad before being sent back home.
This arrangement can lead to extended stays for locomotives on “foreign” railroads, and the appearance of such units on routes without run-through trains.”