Abstract: The present invention discloses a mode selectable autonomous provisional traffic signal station unit for establishing traffic control signal light units for mode selectable alternate traffic control configurations. The autonomous provisional traffic signal station further comprises a mode switch to engage unit logic to receive wireless broadcast protocol seeking a slave unit or broadcast protocol as a master unit seeking a slave unit, and programming logic for co-operating traffic control of a road segment managing un-manned two direction vehicle traffic over a temporarily converged alternating one direction flow.