It's, most likely, what I refer to as recycled CWR. When new CWR is placed along the mains, the old stuff, if deemed usable, is reloaded on a CWR P/U train and then dropped for use on sidings, branches and such, where the speeds are limited to 30 mph or lower. This past year CSX has done this proceedure with several sidings between Buffalo and Selkirk. Including the Batavia siding, the Belle Isle siding by the NYS fairgrounds. Track 8 between CP 290 and CP 286 has had old CWR dropped and waiting for placement for over a year.
Harleys and EMDs, some of my favorite rides