M20 (Istanbul Metro)

M20 (Sefaköy – TÜYAP)
M20 (Sefaköy – TÜYAP)
Overview
Status	In planning phase
Owner	Istanbul Metropolitan Municipality
Line number	M20
Locale	Istanbul, Turkey
Termini	Sefaköy; TÜYAP;
Stations	10
Service
Type	Rapid transit
System	Istanbul Metro
Operator(s)	Metro Istanbul
Depot(s)	TÜYAP
History
Planned opening	2030
Technical
Line length	18.51 km (11.50 mi)
Number of tracks	2
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The M20, officially referred to as the M20 Sefaköy–TÜYAP Metro Line is a planned rapid transit line in Istanbul.^[2]^[3]

The line was originally conceived as an extension to the M2 line^[4] but was later made into its own lines due to conflict and lack of communication between the opposition-controlled Istanbul Metropolitan Municipality and the government-controlled Ministry of Transport and Infrastructure and was later given the line code M20 on the vision map.^[2]

History

The line will be crucial for the districts it passes through with a total population of 3.5 million people, who currently have no alternative other than the Metrobus. Works on the line has not started yet, the plans and projects prepared by Istanbul Metropolitan Municipality (IMM) were not approved by General Directorate of the Infrastructural Investment (AYGM) for a period spanning more than a year.^[5]^[6] As a result of long discussions, the environmental impact assessment report process started on August 5, 2022.^[7] In the statement made by the Mayor of Istanbul, Ekrem İmamoğlu, he announced that the AYGM approval was received and that they are currently working on approval from the treasury.^[8]

In January 2025, the Turkish Presidency didn't give approval to start the construction for the sixth time even though all paperwork for the project was complete.^[9]^[10] The common view among the public on why the Presidency denies a signature from the project is the political polarization in Turkey.^[11] In recent years, Istanbul at large and the districts that the metro line surpasses tended to vote for the main opposition party, instead of the president's political party. Also, President Erdoğan sees Mayor İmamoğlu as an opponent in the next presidential elections and by delaying the construction he seeks to prevent a political victory for İmamoğlu.

Stations

No	Station	District	Transfer	Type	Notes
1	Sefaköy	Küçükçekmece	・ (Sefaköy) İETT Bus: 36AS, 73B, 73F, 73H, 76, 76C, 76O, 76V, 79Y, 89, 89A, 89B, 89BS, 89F, 89K, 89S, 98, 98AB, 98KM, 98S, 98TB, 146, AVR1A, HS3, HT20, KÇ2, MR42	Underground
2	Cennet		İETT Bus: 76, 76C, 76O, 89F, 146
3	Küçükçekmece		(Küçükçekmece)・ (Küçükçekmece) İETT Bus: 76, 76C, 76D, 76O, 89F, 145, 146, MK16, BN1
4	Reşitpaşa	Avcılar	İETT Bus: 76, 76C, 76O, 145, 146
5	Avcılar Merkez		(Avcılar Merkez) İETT Bus: 76, 76B, 76BA, 76C, 76D, 76G, 76O, 142, 142A, 142ES, 142F, 142K, 144A, 145, 146, 303A, 401, 429A, 458, BM4, HS2, HT29, HT48		Istanbul University-Cerrahpaşa
6	Cihangir		(Cihangir Universitesi) İETT Bus: 76, 76BA, 76C, 76G, 76TM, 76Y, 145, 146, 147, 303A, 401, 429A, 458, BM4, HT29, HT48
7	Saadetdere		İETT Bus: 76, 76BA, 76C, 76G, 145, 303A, 401, 429A, 458, BM4, HT29, HT48
8	Beylikdüzü	Beylikdüzü	・ (Beylikdüzü) İETT Bus: 76, 76BA, 76C, 76G, 76TM, 144, 144H, 145, 303A, 400A, 401, 401T, 418, 429A, 448, 458, BM5, ES1, HT29, HT48		Beylikdüzü Square・Marmara Park
9	Yıldırım Beyazıt	Beylikdüzü	(Cumhuriyet Mahallesi) İETT Bus: 76BA, 76C, 76G, 76TM, 142B, 142T, 144, 144H, 303A, 400A, 401, 401T, 418, 429A, 448, BM6, BM7, ES1, ES3, HT48
10	TÜYAP	Büyükçekmece	(Beylikdüzü Sondurak) İETT Bus: 76TM, 142B, 142T, 300, 300B, 300C, 300D, 300G, 300M, 300S, 303A, 401, 401T, 448, HT19, HT48		TÜYAP Fair and Congress Center [tr]