Prefab Parts for the System Today's manufacturing can do wonders, and the creation of factory built system parts is common.  We can factory build piers, wall skins, pipes, track beds, turbines, signal and communications systems and much more.  Much of the BorderTransportationSystem can be built in factories, thus assuring standardization of components, economy of scale, and minimum requirements for employee training.  Here are some of the proposed items of the system that can be factory build and shipped to the install sites. Index of ... Crossing barriers Pipeline supports Rail Bed Rail Bed internal stairways Rail Bed piping Signal Boxes Solar Panels Stations Towers Wind Turbines