Rolling eastward towards Chicago, Amtrak's Train #4, The Southwest Chief passes the Semaphores at MP 706. This pair of blades is the easternmost remaining working semaphores on this line, and as of now (March 2020) are on a death watch as replacement signals are trickling into the area. As seen on the cover of the General Code of Operating Rules 8th Edition. The GCOR is the standardized rule book that nearly every railroad west of Chicago uses.
