Instead of relying on relays to transmit signals to points, tracks, and signals, the new system directly interfaces with these components, eliminating a potential point of failure, says railway ...

EBI Lock computer-based interlocking systems lock and release train routes on main line and mass transit systems. They supervise and control wayside objects such as signals, point machines and level ...

American Axle & Manufacturing has patented a vehicle drive unit with an interlock system to enhance power transfer to a differential input member. The system inhibits electrical power supply if ...