Abstract: A signaling system and method provide a first lamp assembly including one or more light generating devices configured to activate to inform an operator of a vehicle system of information related to movement of the vehicle system. The first lamp assembly includes processing circuitry configured to control and monitor operation of the one or more light generating devices. A wayside station is configured to be communicatively coupled with the first lamp assembly by a single conductive communication pathway. The wayside station is configured to conduct electric current to power the first lamp assembly and to communicate with the processing circuitry of the first lamp assembly via the single conductive communication pathway.

Abstract: A portable system (20) for testing an electro-optical guidance assembly (22) includes an electro-optical test unit (40) with at least two sources of electromagnetic energy at different wavelengths for selectively illuminating the guidance assembly. The electro-optical test unit (40) is mounted within a frame (56) that can be part of a wheeled cart (50). The system (20) further includes one or more of: an adjustable fixture (84) for supporting a guidance assembly (22) for testing, a processor unit (42) for controlling the electro-optical test unit (40), a power supply unit (44) for providing electrical power to the electro-optical test unit (40) and the guidance assembly (22), and a leak test unit (46) for generating a vacuum in the guidance assembly (22) or for pressurizing the guidance assembly (22) with an inert gas to test for leaks.