Most all of the network's route mileage is double-tracked.
One exception is the fairly lengthy distance between the last two stations on the
Green Line, Gillespie Field and Santee Town Center.
That final stop, shown in this 2001 view, was then served by the Orange
Line. The terminal was located in what at that time was rather the middle of a large field.
There was development nearby, but none
directly surrounded the tracks.