# T4 (Istanbul Tram)

T4 Topkapı - Mescid-i Selam tram line (Turkish: T4 Topkapı - Mescid-i Selam tramvay hattı) is a light rail line in Istanbul, Turkey, operated by Istanbul Ulaşım AŞ. It runs from Topkapı north to Mescid-i Selam, a total of 15.3 km (9.5 mi). The T4 line operates its own right-of-way in a street median for most of its route, though with a few at-grade crossings, thus technically making it light rail though the operator Metro Istanbul categorizes it as a tramline.
The first section of the T4 line opened between Edirnekapı and Mescid-i Selam on 12 September 2007. An extension southwest of Edirnekapı to Topkapı was opened on 18 March 2009.
Connections to the M1 line are available at Vatan station, while connections to the T1 tram line and the Istanbul Metrobus are available at Topkapı station.

## Stations

| Station | Type | Transfer | District | Notes |
| Topkapı | Level | ・ İETT Bus: 31, 31E, 33B, 41AT, 50B, 71T, 72T, 73, 73F, 76D, 79Ş, 82, 85C, 85T, 89, 89B, 89K, 92, 92T, 94, 94A, 94Y, 97, 97A, 97B, 97BT, 97T, 500L, 500T, MR11 | Zeytinburnu | Southern terminus |
| Fetihkapı | Level | İETT Bus: 31E, 33E, 33Y, 36Y, 41AT, 48A, 50B, 50K, 76T, 79E, 85C, 89C, 92K, 93M, 94Y, 145M, 145T, 336Y, 500A, 500L, 500T, E-56 | Zeytinburnu | |
| Vatan | Viaduct | (Vatan station) İETT Bus: 28, 31E, 35D, 38, 38B, 38E, 38Z, 41AT, 41ST, 48A, 50B, 50K, 87, 88A, 93M, 94Y, 500A, 500L, 500T | Eyüpsultan | Park and Ride facility |
| Edirnekapı | Underground | İETT Bus: 28, 31E, 35D, 36A, 36KE, 36V, 37Y, 38, 38B, 38E, 38Z, 41AT, 41ST, 48A, 50A, 50B, 50K, 50P, 50V, 50Y, 55V, 86V, 87, 88A, 93M, 336E, 500L, 500T | Eyüpsultan | Original southern terminus |
| Şehitlik | Level | İETT Bus: 36A, 36KE, 36M, 36V, 37Y, 38, 38B, 38E, 38Z, 48A, 50A, 50B, 50K, 50P, 50V, 50Y, 86V, 88A, 336E | Eyüpsultan | |
| Demirkapı | Level | İETT Bus: 36, 36A, 36KE, 36M, 36V, 37Y, 38, 38B, 38E, 38Z, 48A, 50A, 50B, 50K, 50P, 50V, 50Y, 86V, 88A, 336E | Eyüpsultan | |
| Topçular | Underground | İETT Bus: 36, 36A, 36KE, 36M, 36V, 37A, 38, 38B, 38E, 38Z, 50A, 50P, 88A, 336E | Eyüpsultan | |
| Rami | Underground | İETT Bus: 36, 36A, 36KE, 36M, 36V, 37Y, 38, 38B, 38E, 38Z, 50A, 50P, 55Y, 336E | Eyüpsultan | |
| Uluyol-Bereç | Underground | İETT Bus: 36, 36A, 36KE, 36M, 36V, 38, 38B, 38E, 38Z, 336E | Gaziosmanpaşa | |
| Sağmalcılar | Level | İETT Bus: 36, 36A, 36KE, 36M, 36V, 38, 38B, 38E, 38Z, 336E | Gaziosmanpaşa | |
| Bosna-Çukurçeşme | Level | İETT Bus: 36, 36A, 36CY, 36KE, 36M, 36V, 336E | Gaziosmanpaşa | |
| Ali Fuat Başgil | Underground | İETT Bus: 36, 36A, 36CY, 36KE, 36M, 36V, 336E | Gaziosmanpaşa | |
| Taşköprü | Underground | İETT Bus: 36, 36A, 36CY, 36KE, 36M, 36V, 336E | Gaziosmanpaşa | |
| Karadeniz | Underground | İETT Bus: 36, 36A, 36CY, 36KE, 36M, 36V, 336E, HT5 | Gaziosmanpaşa | |
| KİPTAŞ Venezia | Level | (Karadeniz Mahallesi station) İETT Bus: 36A, 36CY, 36M, 36V, 336E | Gaziosmanpaşa | Formerly known as Metris |
| Cumhuriyet | Level | İETT Bus: 36A, 36CY, 36EM, 36M, 36V, 79GE, 79KM, 79KT, 336, 336E, 336G, 336M, 336Y | Sultangazi | |
| 50. Yıl-Baştabya | Level | İETT Bus: 36A, 36CY, 36EM, 36M, 36V, 79GE, 79KM, 79KT, 336, 336E, 336G, 336M, 336Y | Sultangazi | |
| Hacı Şükrü | Level | İETT Bus: 36A, 36CY, 36EM, 36M, 36V, 336E, 336Y | Sultangazi | |
| Yeni Mahalle | Level | İETT Bus: 36A, 36CY, 36EM, 36M, 36V, 336E, 336Y | Sultangazi | |
| Sultançiftliği | Level | İETT Bus: 36A, 36B, 36CB, 36CE, 36CY, 36EM, 36F, 36HT, 36L, 36M, 36T, 36TC, 36V, 78C, 336E, 336MC, 336T, 336Y | Sultangazi | |
| Cebeci | Level | İETT Bus: 36B, 36CB, 36F, 36HT, 36L, 36TC, 36V, 50AB, 78C, 79C, 336E, 336MC, 336T, TM18 | Sultangazi | |
| Mescid-i Selam | Level | İETT Bus: 36B, 36CB, 36F, 36HT, 36L, 36TC, 36V, 36Y, 38H, 48G, 50AB, 79C, 79F, 79KM, 79KT, 336, 336A, 336K, 336M, 336MC, 336T, H-6, TM18 | Sultangazi | |
| ↓↓ 2029 Construct Planing ↓↓ |||||
| Eski Habibler | ???? | İETT Bus: 36B, 36CB, 36F, 36HT, 36S, 36TC, 36V, 36Y, 38H, 48G, 79C, 79F, 79KM, 79KT, 336, 366A, 336K, 336M, 336MC, 336T, H-6 | Sultangazi | |
| Habibler | ???? | İETT Bus: 36B, 36CB, 36F, 36HT, 36S, 36TC, 36V, 36Y, 48G, 79C, 79F, 79KM, 79KT, 336, 366A, 336K, 336M, 336MC, 336T, H-6 | Sultangazi | |
| Pirinççi | ???? | İETT Bus: 36B, 36CB, 36F, 36HT, 36S, 36TC, 36V, 36Y, 79C, 79F, 79KM, 79KT, 336, 366A, 336K, 336M, 336MC, 336T, H-6 | Eyüpsultan | |

## Rolling stock
### ABB

For a brief period of time, bulky high-floor ABB LRVs (similar to ones used in M1) were used. After additional rolling stock was added however these trains were moved to operate on the M1 line.

### Duewag

These are old B80S and B100S sets that were used on Cologne Stadtbahn and purchased in 2007. They were used on both T1 and T4 lines (including the ex-T2 that merged into T1) and with the arrival of Alstom Citadis trams on the T1 line they began to operate on the T4 line only.

### Hyundai Rotem LRV34

From 2008, 63 units. Same vehicles used in on the Adana Metro and very similar to the LRTA 1100 class in Manila, Philippines. Unlike the other models, these only have a cab at one end.

### RTE

More recently (from 2014) new high-floor trams that were constructed by Metro Istanbul (the operator) itself are also used. During its development, there were intermediate models (RTE 2000 and RTE 2009) that operated on the line.