The new extension connects the Atatürk Cultural Center and Ankara Train Station with Kızılay - the largest transit complex of the Ankara Metro system. This new extension of the M4 line has a total length of 3,3 km, and it will be open to passengers in 2021.

To ensure the security of passengers and improve the daily operations, SEE Telecom will enhance the radio coverage of the new metro extension, providing TETRA Channels for Operations & Maintenance, UHF Channels for Police, and VHF Channels for Health Department.