The Samsun-Sivas Regional is an intercity rail service operated by TCDD Transport.
[1] It operates between two major cities of Turkey, Sivas and Samsun, and also services touristic Amasya.
[2] Apart from a short stretch near Sivas the trains operate on the Samsun–Kalın railway.
It takes 8 hours[3] to travel 431 km[4] and has been criticised as very slow.
[2]