1: Zaječar – Knjaževac (DEVELOPED_WITH_SIGNS)

2: Knjaževac – Pirot (DEVELOPED_WITH_SIGNS)

3: Pirot – Gradina (DEVELOPED_WITH_SIGNS)

4: Gradina – Tran (UNDER_DEVELOPMENT)

5: Tran – Treklyano (UNDER_DEVELOPMENT)

6: Treklyano – Kyustendil (UNDER_DEVELOPMENT)