Metra unit #90 is an EMD F59PHI diesel-electric locomotive that has become especially well known among railfans because it carries a striking Chicago and North Western Railway heritage paint scheme. The locomotive was repainted in 2020 to honor the legacy of the historic Chicago and North Western railroad, whose commuter operations eventually became part of today's Metra system. Metra regularly uses the locomotive on trains operating from Ogilvie Transportation Center—the downtown terminal that once served as the original North Western Station. From the platforms at Ogilvie, unit 90 can often be seen leading commuter trains on the Union Pacific North, Northwest, and West lines, its yellow-and-green C&NW colors recalling the railroad heritage that helped shape Chicago's modern commuter network.