1: Zaječar – Knjaževac (Developed + Signed)
Developed + Signed

2: Knjaževac – Pirot (Developed + Signed)
Developed + Signed

3: Pirot – Gradina (Developed + Signed)
Developed + Signed

4: Gradina – Tran (Undeveloped / Unknown)
Undeveloped / Unknown

5: Tran – Treklyano (Undeveloped / Unknown)
Undeveloped / Unknown

6: Treklyano – Kyustendil (Undeveloped / Unknown)
Undeveloped / Unknown