Alstom has completed and put into service its interlocking system on 328km of the Eskisehir-Kutahya-Balikesir mainline for its client, Turkish State Railway Administration (TCDD).

The project was delivered in eight sections. Alstom completed and commissioned the interlocking system for the first five sections – covering more than 182km and encompassing the telecommunications and traffic control centre – on 5 December 2020. It then completed and commissioned the remaining three sections, measuring 146km on 5 February 2021.
source= https://railway-news.com/alstom-completes-interlocking-system-in-turkey/