CPK Collaborates with Korea National Railway for High-Speed Rail Development Yurtdışı Haberleri by railsistem - Mayıs 21, 20250 Centralny Port Komunikacyjny (CPK) and Korea National Railway (KNR) have signed a cooperation agreement focused on the development of high-speed rail infrastructure in Poland. The partnership will facilitate the exchange of technical expertise and operational knowledge between the two national infrastructure managers. The agreement was signed by Dr Filip Czernicki, CEO of