The Northern Ireland railway network is currently 330.58 km ( 205.41 mi ) .
Northern Ireland Railways ( NIR ) , formerly and briefly called Ulster Transport Railways ( UTR ) , is responsible for running the railway network in Northern Ireland .
The NIR   railway network is currently 330.58 km ( 205.41 mi ) .
Northern Ireland Railways ( NIR ) , formerly and briefly called Ulster Transport Railways ( UTR ) , is responsible for running the railway network in Northern Ireland .