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.