The B2 (Halkalı-Bahçeşehir) suburban or Halkalı-Bahçeşehir Rail System is a suburban train line that operates between Halkalı station and Bahçeşehir station in Istanbul.
Following the demands for the extension of Marmaray's westward terminal station, Halkalı, to Ispartakule and Çatalca, in 2019, the Başakşehir Municipality announced that it would open a temporary train line to connect the residents of the region to Halkalı. Due to the single track between Halkalı and Bahçeşehir and the absence of a signaling system, the system can only operate with a transfer to the Marmaray line twice a day in each direction.
While the construction of Bahçeşehir station was undertaken by the Municipality of Başakşehir, the construction of Ispartakule, Altınşehir, and Konut Birlik stations are being constructed by the Turkish State Railways.
On September 18, 2021, with the completion of the construction of the terminal station in Bahçeşehir, Mayor Yasin Kartoğlu of Başakşehir announced the successful completion of the first trial run of the line.
The line originally only operated between the Halkalı and Bahçeşehir stations, and later the Ispartakule station, with its opening on January 29, 2024. The Konut Birlik station is in the final stages of its construction, while the Altınşehir station is still in its initial phase. In the future, it is anticipated that the necessary installations for these stations will be completed, making them ready for operation.
On June 19, 2026, TCDD announced that the suburban rail has been taken Out of Service indefinitely due to construction works at the Halkalı-Kapıkule high-speed railway. The train remains Out of Service with no clear date for reopening
Stations
OrderStationDistrictTransfer(s)TypeNotes↓↓ Out of Service ↓↓1HalkalıKüçükçekmece (Halkalı)・ İETT Bus: 79Y, 89A, 89BS, 98S, 143, BN1, H-3, MK16, MR40, MR42, MR50, MR51, MR52, MR54At-gradeTCDD Residences・Halkalı Customs Directorate・Halkalı Marmaray IETT Platforms↓↓ Under construction↓↓2Konut BirlikKüçükçekmeceİETT Bus: 36AS, 76V, 79G, 79Ş ,79Y, 89A, 89K, 98S, 141M, HT1, HT20, KÇ2, MK16, MK31, MR51At-grade3AltınşehirİETT Bus: 79G, 79Ş, HT20↑↑ Under construction ↑↑4IspartakuleBaşakşehir (Ispartakule) İETT Bus: 76A, 76V, 142B, 142E, 142T, 144M, 146T, 147, E-57, E-58, E-59, HS2, MK14, MK15At-gradeBahçeşehir Pond5BahçeşehirİETT Bus: 142, 142A, 144K, 146, 146T, E-59, MK15, Pazartürk Fair and Exhibition Area↑↑ Out of Service ↑↑
Station distances
Measurements have been taken based on the middle section of the platforms of the stations OrderStationDistances between stationsDistance from the initial stationDistance from Sirkeci1Halkalı0+00 kmDeparture27+63 km2Konut Birlik2+14 km2+14 km29+77 km3Altınşehir2+66 km4+80 km32+43 km4Ispartakule5+59 km10+39 km38+02 km5Bahçeşehir2+96 km13+35 km40+98 km
References