In an endeavour to implement the Panmunjom Declaration, the South Korea and the Democratic People's Republic of Korea (DPRK), will conduct a joint study on connecting and upgrading railways over their border.
This came after delegates from the two Koreas held talks in the connection.
In order to let the joint team launch an on-spot investigation on July 24 into the railway along the west corridor, Seoul and Pyongyang decided to form an investigation team.
Both the sides also agreed to investigate the DPRK railways first, at an earliest possible date.
Earlier, in April, North and South Korea agreed to sign a peace treaty formally later this year, ending a 65-year-old long war between them.