| Southern Line | |
| Type: | Commuter rail |
| System: | İZBAN |
| Status: | Operating |
| Locale: | İzmir, Turkey |
| Start: | Alsancak |
| End: | Selçuk |
| Stations: | 18 |
| Daily Ridership: | 40,500 (2010) |
| Open: | August 30, 2010 |
| Owner: | TCDD, İBB |
| Operator: | İZBAN |
| Depot: | Cumaovası |
| Stock: | E22000 EMUs |
| Linelength: | 77km (48miles) |
| Tracks: | 2 |
| Speed: | 140km/h |
| Electrification: | 25 kV AC |
The Southern Line (Turkish: Güney hattı) is an electrified commuter rail line running south from Alsancak Terminal in Izmir to Torbalı operated by İZBAN, using trackage owned by the Turkish State Railways. The route services the densely populated areas of western Buca and central Gaziemir as well as Adnan Menderes International Airport via the rebuilt airport station. Between 2010 and 2016 the southern terminus of the line was Cumaovası near Menderes. On 6 February 2016, the line was extended about 30km (20miles) south to Tepeköy in Torbalı and on 9 September 2017 extended further south to Selçuk.[1]
All stations are wheelchair accessible with elevators.[2]
The Southern Line has carried approximately 1 million passengers in the first six months from opening and carries an average 40,500 passengers daily, making it the busiest commuter rail line in Turkey, surpassing the Haydarpaşa-Gebze Commuter Line in Istanbul that held the record for over 30 years.[3]
The Southern Line starts at Alsancak Terminal in Alsancak. From there it continues south (crossing the tracks to Basmane at the famous Hilal Cross) towards Kemer and then traverses the southern hills of Kadifekale. At Şirinyer, the tracks enter the Şirinyer Tunnel, where it stops at Şirinyer station. After exiting the tunnel, the line goes through Buca, under the Karabağlar Intersection and into Gaziemir. After Gaziemir, the line stops at Adnan Menderes Airport and then leaves the city limits to its final destination; Cumaovası.