This page list all the loops and triangle that are existing, or use to exist, on TCDD network. Due to the large fleet of single cab diesel still used by TCDD, these triangle and loops are still useful.
| Afyon | Afyon Ali Çetinkaya station is equipped with a loop track, leaving Afyon to the northeast, turning back to the west and joining the station tracks just west of the platform tracks. Generally, through trains from Alayunt to Uşak or Karakuyu use this track in order to avoid reversing. |
| Ankara | The loop is east of the station. It passes under the main track to Kayseri. It allows turn back to Istanbul. It was around the yard when there were steam sheds, now is in a tunnel. Electrified (contact wire only, no messenger cable). |
| Haydarpaşa | The loop track runs northeast (railroad east) from just under the Üsküdar-Kadiköy roadway bridge near the "freight wagon repair facility". It continues behind the "electric train depot", behind the roundhouse, under the mainline, past the freight warehouses and connects with the coach yard southeast of the passenger platforms. This loop connects only sidings to sidings and the headshunt is quite short. Most Intercity passenger sets are turned here, but require at least four movements, including a move on to the main tracks. |
| Irmak | Loop south side of station to turn trains from Zonguldak / Karabük direction to Kayseri direction. |
| Karakuyu | A single line loop track leaves Karakuyu station to the west and joins the Afyon bound line after turning to the northeast. Railcars regularly shunt over this loop with passengers. The Gülistan-Ekspresi (Ankara – İsparta) used this loop in order to avoid reversing at Karakuyu (this train no longer runs). |
| Kütahya | In order to avoid reversing, all trains from Eskişehir to Afyon and vice versa) calling at Kütahya station are using the loop allowing to approach the station from the west prior to arrival at Kütahya. |
| Narlı | Electrified loop track leaving the station to the southwest, turning to the northeast and joining the Malatya bound line. All trains to and from Malatya reverse in Narlı and use this loop track. |
| Akyaka | Akyaka is the last Turkish station before the border, on the line to from Kars to Armenia. It thus acts as a terminal point for TCDD stock and the triangle was used to turn steam engine. Although still in place, this triangle is presumably not used any more. |
| Adana | A triangle use to exist to reach the former Mersin to Adana station from the present station. This triangle was built in the days of the Baghdad Railway. It is now long gone but the roadbed is still visible. |
| Alayunt | Triangle east of the station to allow through running from Kütahya to Afyon without reversing at Alayunt. |
| Ankara Behiçbey Depot | A triangle is located next to the loco repair shop for turning trains. In April 2002, it appeared disused. |
| Arifiye | Electrified triangle east of Arifiye station allowing direct connection between Bilecik and Adapazarı. |
| Balıkesir | This triangle is located north of Balıkesir, between the line to Bandırma and the line Kütahya. It allows trains to proceed straight from Kütahya to Bandırma. |
| Boğazköprü | This triangle is located west of Boğazköprü station. It allows direct connection from Ankara to Adana without reversing at Boğazköprü. |
| Çamlık | A direct chord allowed access from the new station to the coaling station located in the old station. This chord is still in place. Of course, the coaling station and the old station gave way to the steam museum and all the switches from the main line to the old station have been removed. |
| Çetinkaya | Electrified triangle east of the station for iron ore train going straight from Divriği to Iskenderun, thus avoiding reversing in Çetinkaya |
| Enveriye | Electrified triangle west of Eskişehir at Enveriye station. This triangle is for southbound (Kütahya bound) trains from Istanbul direction. Trains swap electrics for diesels here. These trains by-pass Eskişehir-Gar. |
| Halkapınar | Halkapınar is located on the Basmane Manisa line, about a 1,5 km away from Hilal. This is a somewhat new triangle set up with a dual purpose:
- give a new access for the tracks of Izmir docks (in place of the access from Alsancak station).
- make up for the removal of the triangle at Hilal, which among other thing, was used to turn trains. |
| Izmir Hilal | See here for details about thi famous point crossing between Basmane and Alsancak. |
| Kütahya | Along with the loop (see above), there is also a triangle to allow trains coming from the Seyitömer branch to enter the station on both sides. |
| Ladik | Ladik is on the Samsun Sivas. The triangle is located opposite of the station for turning steam engines. |
| Malatya | Electrified triangle south west of the station for iron ore train going straight from Divriği to Iskenderun thus avoiding reversing in Malatya |
| Ortaklar | A track allows direct access from Aydın to Söke without reversing in Ortaklar. This triangle is disused but the track is complete and in fair condition (only minor grass in September 2002). It all looks like it is used once a year for a special shunting. |
| Toprakkale | This triangle is located east of Toprakkale station, between the line to Osmaniye and the one to Iskenderun. It allows also direct connection from Osmaniye to Iskenderun for electric trains without reversing at Toprakkale station. |
| Yenice | This loop allow direct connection from Ankara / Durak towards Mersin without reversing in Yenice station. |
