T8AFAO, I also pedeled out to the L&N Shops. The 2 Roundhouses are part of the U of L Campus now.
They had a "slip track", that they would use to "run in engines", make timing adjustments. Mr. Hollenseed the "Master Mechanic", who was on my neighborhood paper route told me, that was what it was used for!
My trips around the different rail yards and shops/roundhouses in the Louisville Area, I never ever saw another one.
I always wondered how the others did their adjustments? Run along side!!!!..........................
