Those types of events, where a signal is missed, where the movement exceeds what's called “the limits of authority”, are reportable occurrences under our act. We don't always investigate completely with a full report. It depends on the situation, but we have investigated many of those and that is what led us to recommend video recorders in addition to the audio recorders that we recommended several years previously, as well as some form of automated control to stop or slow a train if a signal isn't properly responded to.
On September 11th, 2017. See this statement in context.