McCain Inc.’s ATC cabinet increases driver and personnel safety, enhances overall operations and provides a viable migration path to low-voltage intersections. The rack-mount, modular cabinet features compact, high-density (HD) relays from Struthers-Dunn and switch packs from the Eberle Design, Inc. new iPack series. The use of HD components minimize space requirements, so the cabinet can monitor up to 28 HD load switches plus four virtual channels and 120 detector inputs with additional equipment or storage space. Safety features include the ability to flash an intersection while replacing the output assembly and load current monitoring for each output. The current AC version can be easily retrofitted for DC applications, providing a practical migration path from 120 VAC to 48 VDC.