At present, Ankara's rapid transit system consists of three metro lines – the Ankaray (A1), the M1 and the M4.

[3] The Ankaray (from Turkish: Ankara ray, meaning Ankara rail), a light rail transit system (Turkish: Hafif Raylı,[4] though the line does operate as more of a "light metro" line) was the first phase of the modern rapid transit network of the city.

The line runs between AŞTİ (Turkish: Ankara Şehirlerarası Terminal İşletmesi – Ankara Intercity Bus Terminal) and Dikimevi, covering a distance of 8.53 kilometres (5.30 mi), of which 6.68 kilometres (4.15 mi) is through tunnels.

In 2019 Turisk defense firm ASELSAN began traction and control upgrades on the older Bombardier cars.

The underground trains used on the Ankaray line were built by the Italian wagon manufacturer AnsaldoBreda in Naples, Italy in cooperation with Siemens.

[5] The original vehicles used on the M1 line are Bombardier Transportation-built modified versions of the sixth-generation H-series trains used on the Toronto subway.

The Toronto trains on which they were based on were built in 1986 by the Urban Transportation Development Corporation (UTDC), a company later purchased by Bombardier.

[11] Both Ankara Metro and Ankaray depend on Communications-based Train Control railway signalling system.

However, in Ankara Metro, signals are only activated by automatic control by specific rules.

Unlike other subways, Ankara Metro does not use green signal on normal operations.

The strict rule of flashing (or blinking) yellow signal depends on these two conditions that must be met at the same time: The Metro arriving at the station or present at the station must be in standard operation mode and at least one chunk towards to forward direction must be free.

Unlike the Ankara metro, the yellow signal turns on when a rail change is going to be made.