EPU Engineering

EPU Engineering is a Jacksonville, Florida engineering practice focused on railroad signal engineering, wayside telemetry, and software development. It created RWTS (Railroad Wayside Telemetry Standard), an open Apache 2.0 protocol that unifies grade crossings, signals, switches, detectors, and power systems under a common IoT message format regardless of vendor. EPU's engineers have designed and maintained signal systems for Class I railroads, regional carriers, and short lines across North America, including historical work for CSX, BNSF, Norfolk Southern, Union Pacific, Canadian National, and CONRAIL. Its Wayside Maintenance Monitoring System - comprising Wayside Sentinel, Wayside Overwatch, and Wayside Nexus - is the reference implementation of RWTS, providing edge monitoring, fleet dashboards, and centralized telemetry aggregation.