sentences:  New signalling has been introduced, and the signal boxes at Castlerock and Waterside, Derry closed, with the line operating under absolute block.An hourly service between Belfast and Derry was introduced on 3 July 2017.Phase 3 will include rail renewal between Castlerock and Eglinton, the introduction of a line speed between Castlerock and Derry and other works, however funding for this part of the project is doubtful for the foreseeable future.