A Gulf, Mobile & Ohio train stops in Joliet to pick up passengers for Springfield and points south on a very gray day in 1966. At this point in time it was very clear that the financials did not favor the continuation of service of any kind. The train was dirty, the equipment unreliable and it really only ran because they had a contract with the post office for bulk mail. Count the head end revenue cars.
Check out that elevated dwarf semaphore.
I caught this engine on this train more than once [link]