Strange DPU Placement

Does anyone know why there is an autorack between two locomotives on this CSX train? Is it damaged and being taken for repairs? One suggestion for this was possibly for bridge loading. Could this be the case as well?

Link to the post: https://www.reddit.com/r/trains/comment ... h_clinton/

I'd guess a busted air line on the autorack. Having the car between the locomotives allows air from the second loco to feed the rest of the train. Can't couple it to the end of the train because the EOT needs live air to function correctly.

It is against the rules to have a DP train without a continuous brake pipe throughout the train. Obviously the DP unit uses radio signals to know what to do. On long trains, certain places where mountains or tunnels are, the radio signal is disrupted. This wouldn't be likely on such a short train, but what if a DP radio fails? The system is designed so that the remote keeps doing what it was last instructed to do, in the event of a communication loss. As a safety feature, a straight 20 psi brake pipe reduction will idle a remote, if it is in communication loss. A remote can also be used as a marker, if none was available. That is likely the situation.