North American rail terminals need productivity improvements to handle increasing rail volumes and improve terminal performance. This paper examines the benefits of double cycling in wide-span gantry terminals that use automated transfer management systems. The authors demonstrate that the use of double cycling rather than the currently practiced single cycling in these terminals can reduce the number of cycles required to turn a train by almost 50% in most cases and reduce train turn time by almost 40%. This change can provide significant productivity improvements in rail terminals, increasing both efficiency and competitiveness.
Goodchild, Anne, J. G. McCall, John Zumerchik, and Jack Lanigan Sr. "Reducing Train Turn Times with Double Cycling in New Terminal Designs." Transportation Research Record 2238, no. 1 (2011): 8-14.