"Made in RSA" The outer panels for the GE Radial Trucks on this Canadian Pacific AC4400CW are forged in the Republic of South Africa. Radial-steering trucks allow the wheels of a truck to bend around a curve. Compared to the regular high adhesion trucks that you find on C44-9W's and ES44DC/AC's these radial trucks reduce wear on the rails as they tackle curves. Hi-Ad trucks have fixed axles, and as they travel around a curve, the outer wheel tries to straighten the curve, creating wear on the rails. EMD has a nice page explaining the radial truck in further detail here: EMD Radial Trucks