At its Km 4 it crosses the river Tundzha and passes through the spa resort of Slivenski Mineralni Bani and the village of Zlati Voyvoda.

The road then crosses the eastern reaches of the Sredna Gora mountain range and at the village of Kamenovo it enters the northeasternmost past of the Upper Thracian Plain.

[2] It bypasses the city from the southeast and south and at the village of Bogomilovo it heads southwest and enters the eastern low areas of the Chirpan Heights.

The road goes through the village of Rakitnitsa, bypasses the town of Chirpan[2] from the southeast, south and southwest, and continues westwards.

It passes through Plodovitovo and Mirovo, crosses the river Maritsa and enters Plovdiv Province.