The EMTRAC system uses “Virtual Fixed Blocks” to designate allowable speeds for specific segments of track. These blocks can be customized on the fly to allow for special events or temporary speed restrictions.
When equipped trains exceed defined speed limits, both operations center personnel may be notified of the event by the Central Monitor software, which also saves a detailed log of designated events and train activity. Central Monitor may also be configured to email these events to designated personnel on a periodic basis.
As with all other defined safety thresholds, train operators may be alerted about excessive speed by the in-cab Control Head.