Complex sentence: An automated voice system was added to announce each station (e.g., "The next station is Bloor, Bloor Station.") and replaced the need for the train operator to announce each stop which has since been installed throughout the entire subway and RT system.
Split into simpler sentences: An automated voice system was added to announce each station (e.g., "The next station is Bloor, Bloor Station.") and replace the need for the train operator to announce each stop. The automated system has since been installed throughout the entire subway and RT system.