The Central Northern Railway (Spanish: Ferrocarril Central Norte, FCCN) was the first 1,000 mm (3 ft 3+3⁄8 in) (metre gauge) railway built by the Argentine State Railway. Its aim was to extend the existing British-owned Central Argentine 5 ft 6 in (1,676 mm) broad gauge) railway from Córdoba to Tucuman and metre gauge was chosen for economic reasons.