The P'yŏngnam Line is an electrified standard-gauge trunk line of the Korean State Railway in North Korea, linking P'yŏngyang with the port city of Namp'o and the hot springs at P'yŏngnam Onch'ŏn. The length of the line is 89.9 km (55.9 mi).
The Sŏhae Line, also known as the Anju Colliery Line, is a partially electrified standard-gauge secondary line of the Korean State Railway in South P'yŏngan Province, North Korea, running from Mundŏk on the P'yŏngŭi Line to Hwap'ung. The line is electrified between Mundŏk and P'yŏngnam Sŏho and between Ch'ŏngnam and Sŏsi.
The Kaech'ŏn Line is an electrified standard-gauge secondary line of the Korean State Railway running from Sinanju on the P'yŏngŭi Line to Kaech'ŏn on the Manp'o Line.
The P'yŏngbuk Line is an electrified standard-gauge secondary trunk line of the Korean State Railway in North Pyŏngan Province, North Korea, running from Chŏngju on the P'yŏngŭi Line to Ch'ŏngsu; it meets the Ch'ŏngnyŏn P'arwŏn Line at Kusŏng, and at Ch'ŏngsu, via a bridge across the Yalu River, it goes to Shanghekou, China, where it connects to China Railway's Fengshang Railway to Fenghuangcheng.
The Hwanghae Ch'ŏngnyŏn Line is an electrified standard-gauge secondary line of the Korean State Railway in the North and South Hwanghae provinces of North Korea, running from Sariwŏn to Haeju. It connects to the P'yŏngbu Line at Sariwŏn, to the Ŭnnyul Line at Ŭnp'a, to the Paech'ŏn Line at Changbang, and to the Ongjin Line at Haeju. It plays an important role in the transportation of freight and passengers in North and South Hwanghae provinces, serving important mining and industrial areas, as well as one of the DPRK's most important ports for foreign trade.
The Paech'ŏn Line is a partially electrified standard-gauge secondary railway line of the Korean State Railway in South Hwanghae Province, North Korea, running from Changbang on the Hwanghae Ch'ŏngnyŏn Line to Ŭnbit.
The Kangdŏk Line is an electrified standard-gauge secondary line of the North Korean State Railway running from Namgangdŏk on the P'yŏngra Line to Susŏng on the Hambuk Line.
The Manp'o Line is an electrified standard-gauge trunk line of the North Korean State Railway running from Sunch'ŏn on the P'yŏngra Line to Manp'o on the Pukpu Line. The line continues on from Manp'o to Ji'an, China.
The Paektusan Ch'ŏngnyŏn Line is an electrified standard-gauge secondary mainline of the Korean State Railway running from Kilju on the P'yŏngra Line to Hyesan on the Pukpu Line; it connects to the narrow gauge Paengmu Line at Paeg'am Ch'ŏngnyŏn Station, and to the Samjiyŏn Line at Wiyŏn Station.
The Hambuk Line is an electrified standard-gauge trunk line of the Korean State Railway in North Korea, running from Ch'ŏngjin) on the P'yŏngra Line to Rajin, likewise on the P'yŏngra line.
The Musan Line is an electrified standard-gauge secondary trunk line of the Korean State Railway in Musan and Puryŏng counties, North Hamgyŏng Province, North Korea, running from Komusan on the Hambuk Line to Musan, where it connects to the narrow-gauge Paengmu Line. The section from Komusan to Sinch'am is double tracked.
The Kangwŏn Line is a 145.8 km (90.6 mi) electrified standard-gauge trunk line of the Korean State Railway of North Korea, connecting Kowŏn on the P'yŏngra Line to P'yŏnggang, providing an east–west connection between the P'yŏngra and Ch'ŏngnyŏn Ich'ŏn lines.
The Kŭmgangsan Ch'ŏngnyŏn Line is an electrified standard-gauge trunk line of the Korean State Railway in North Korea running from Anbyŏn to Kamho. The total length of the line is 114.8 km (71.3 mi), but it is only in regular use as far as Kŭmgangsan Ch'ŏngnyŏn; the length of the line to there is 101 km (63 mi).
The P'yŏngra Line is an electrified standard-gauge trunk line of the Korean State Railway in North Korea, running from P'yŏngyang to Rajin, where it connects with the Hambuk Line. It is North Korea's main northeast-southwest rail line.
The Ch'ŏngjinhang Line, or Ch'ŏngjin Port Line, is an electrified freight-only railway line of the Korean State Railway in North Korea, connecting Ch'ŏngjin Ch'ŏngnyŏn Station at the southern junction of the P'yŏngra and Hambuk lines with Ch'ŏngjin Port.
The Ch'ŏnnae Line is an electrified 4.4 km (2.7 mi) long railway line of the Korean State Railway in Kangwŏn Province, North Korea, connecting Ryongdam on the Kangwŏn Line with Ch'ŏnnae.
The Ch'ŏngnam Line is a partially electrified standard-gauge secondary line of the Korean State Railway in South P'yŏngan Province, North Korea, running from Ch'ŏngnam on the northern part of the Sŏhae Line to Samch'ŏnp'o via a loop line connecting several collieries to the mainline of the Sŏhae Line.
The Ch'ŏnghwaryŏk Line is an electrified standard-gauge freight-only secondary line of the Korean State Railway in South P'yŏngan Province, North Korea, running from Kubongsan on the Kubongsan Line to Ch'ŏnghwaryŏk.
The Ch'ŏnsŏng T'an'gwang Line, or Ch'ŏnsŏng Colliery Line is an electrified standard-gauge freight-only secondary line of the Korean State Railway in South P'yŏngan Province, North Korea, running from Sinch'ang on the P'yŏngra Line to Ch'ŏnsŏng.
