Someone on NextDoor was complaining about the same thing, and you might find this information interesting, if not helpful: "I have a buddy who works for a railroad contractor. He told me that a few of the SE trunks/routes have been backed up due to damaged tracks (he did not say if it was CSX, Norfolk Southern, Union Pacific, etc.). As a result, some of the trains have not moved as quickly as normal. As for the engine idling, he said its necessary for air pressure, maintaining proper battery charge, etc, especially on older engines...he said on newer engines, some have an alternate way of maintaining system related stuff without the engine."

https://www.fra.dot.gov/blockedcrossings/incidents

It's one (or perhaps the only) switching engine for the CSX rail yard. The switching locomotive's function is to assemble the proper railcars into a long line of cars so that a more powerful loco can just backup, connect and depart to other cities.

The *problem* is that these diesel powered remote-controlled switchers are often poorly maintained. The one we have needs to be retrofitted with a new modern muffler and that's what the City of East Point, if they cared, should be pushing for. It did not used to be this bad, only in the last few months has this become untenable. We have multiple blankets permanently hung in front of the bedroom windows in order to deaden the noise enough so we can sleep.