These 89? tri-level closed auto racks have yellow flat cars, white roofs, excess height ends, and aluminum sides. They?re lettered in white and black and roll on Barber? Roller Bearing trucks. The flat cars, owned by the TTX Corp., were built in January 1972 and rebuilt in February 1989. The end racks, owned by Ferromex Corp., were built in February 1985 and rebuilt in January 1995. Ferromex is a private rail consortium that operates the largest (by mileage) railroad in Mexico.