At the same time, a shortage of power on your own road may have left you unable to handle a sudden, or even seasonal, increase in traffic. Maybe foreign engines visit your servicing facilities from time to time as a part of an agreement between the two railroads. For example, these Toronto, Hamilton and Buffalo GP7’s and GP9’s were a familiar sight in what is clearly a CPRail facility near Toronto.

Whatever the reason, the lease/interchange concept offers the modeller some interesting operational possibilities and also gives him or her a chance to go beyond the layout and run engines from that other favourate railroad.