Pyongbu Line

The P'yŏngbu Line is an electrified standard-gauge trunk line of the Korean State Railway running from P'yŏngyang to Kaesŏng in North Korea and further south across the DMZ to Seoul in South Korea; the name comes from the two (theoretical) termini of the line: P'yŏngyang and Busan.

The total length of the line from P'yŏngyang to Busan is 719.8 km (447.3 mi); however, due to the Korean Demilitarized Zone, regular operation is restricted to the 187.3 km (116.4 mi) section between P'yŏngyang and Kaesŏng. 22% of the line is laid with concrete sleepers, and it is the only railway line in North Korea capable of speeds of 100 km/h (62 mph). The ruling grade is 11‰, the minimum curve radius is 300 m (980 ft), and there are 99 bridges (total length 4,310 m (14,140 ft)) and 13 tunnels (total length 3,244 m (10,643 ft)).

The P'yŏngyang–Hwangju section is under the jurisdiction of the P'yŏngyang Railway Bureau, whilst the rest of the line from Hwangju south is under the Sariwŏn Railway Bureau. There are 28 stations on the line, and the average distance between stations is 6.7 km (4.2 mi). Along with locomotive depots at Sariwŏn, Sŏhŭng, and P'anmun, there are large freight-handling facilities at Hwangju, Chunghwa, East Sariwŏn, Sŏhŭng, P'yŏngsan and Kaesŏng.

The P'yŏngbu Line connects to the P'yŏngui, P'yŏngnam, and P'yŏngra lines at P'yŏngyang, to the P'yŏngdŏk Line at Taedonggang, to the Songrim Line at Hwangju, to the Hwanghae Ch'ŏngnyŏn Line at Sariwŏn, and the Ch'ŏngnyŏn Ich'ŏn Line at P'yŏngsan.