Rock Island received these quad door cars in the Summer of 1966. Auto parts traffic on the Rock Island was fairly significant with bridge traffic in addition to assembly plants located on line. Most of the “Granger Railroads” kept largely to one side or the other of a border stretching from St. Louis to Kansas City and on to Denver. C&NW and MILW for instance were to the north of the line while M-K-T and Frisco were to the south. Rock Island was the only line from have more or less equal portions on both sides of this line. Going from Minneapolis to Dallas. Rock Island was your single-line option. This roadname will be available in 3 road numbers.