The 70 MeV Drive and the 15 MeV Witness linacs propagate in opposite directions, and come to a common area designated as the beamline switchyard, where each linac can branch out into any of several beamlines where experiments are conducted. The primary beamline is optimized for high-charge wakefield experiments to be performed using either the collinear configuration, in which the drive and witness bunches travel along the same structure, or the two-beam-accelerator configuration, in which RF power is transferred from the drive beam decelerating structure to the witness beam accelerating structure, by means of a waveguide.  An emittance exchange beamline receives the beam from the drive linac and can be used to generate longitudinally shaped drive bunch followed by a trailing witness bunch for mm-wave wakefield acceleration experiments as well creating bunch trains for coherent THz radiation generation.