It passes through the village of Parvomaytsi, crosses the river Yantra and southeast of the towns of Gorna Oryahovitsa and Lyaskovets[2] forms a junction at Km 136.4 of the first class I-4 road.

It then passes through the villages of Maryan, Bebrovo, Konstantin and at Maysko it turns south, descends to the valley of the river Stara reka and enters Sliven Province.

Descending through the southern slopes of the mountain range, it runs through the village of Byala and following the valley of the Asenovska reka, a left tributary of the Tundzha, it reaches the city of Sliven.

[2] It then continues southeast and east along the southern slopes of the Bakadzhitsite Heights, forming a junction with the first class I-7 road and running through the villages of Kalchevo,[2] Pobeda, Chelnik, Tamarino and Voynika, before entering Burgas Province.

The road passes through Zornitsa, Zagortsi and Svetlina and descends to the valley of the river Sredetska reka, which it crosses before reaching the town of Sredets.