Software and hardware for controlling trains, namely an on-board computer and display and software with a communication interface for monitoring and reporting train location, onboard fuel data and event recording, interaction with locomotive crew for alertness assurance and performance, railcar and locomotive rear end link status, train pacing, basic and advanced reactive enforcement, authority monitoring and work zone safety alerts, database processing, control and display of data communication from wayside interface equipment, moving maps identifying location of locomotive and railcars, automatic locomotive horn sequencer, automatic video surveillance and signal overlay, and processing and communication of critical safety data for automatic authority generation, dynamic moving block data and railroad crossing activation