The railway line from Mianeh to Ardabil spans 175 Km and is being constructed to connect Ardabil Province to the national railway network, extending further towards Parsabad and the Republic of Azerbaijan. The route begins at the Mianeh station and gradually traverses the mountainous terrain of the Moorlands, running parallel to the Qezel Ozen River. It then follows the Ardabil–Mehmandoost road before reaching Ardabil Station at the 175-Km mark.

Iran Oston Consulting Engineers is responsible for sections 2A, 2B, 2G, and 2D, 20.2 kilometers long, of the 8 construction sections. This portion is among the most challenging mountainous sections of the project, featuring 26 tunnels and 5 large bridges. Additionally, the company oversees the supervision of pavement construction along the entire 217-Km route.