SP SD45X No. 9501 has its red warning light on since its the trailing unit in a light power move.
SPSF 9501 leads a freight down from Tehachapi into Mohave.
One of seven SD45Xs (three wore SP colors), 9501 delivered 4,200 hp 17 years before GE was able to reach 4,000 hp with the C40-8. Kodak ISO 200 print, Leica M-3, Summicron 50mm f2.