2023-12-17 00:00:00 "Randall Train Automation Controller" (RTAC) is part of a suite of free-software for model railroad computer control with the main goal of running trains automatically and performing other event-based automation. It uses JMRI to interface with a model railroad’s command station. The “Conductor” server uses an event-based script to drive the computer automation. The “RTAC” Android software displays the system status on a network of Android tablets.