Gebze Metro

The Gebze Metro is an under-construction rapid transit system in Gebze and Darıca, Turkey. The system consists of a single long line running north from Darıca to Gebze. The metro system will be the first network to exist outside of a provincial capital in Turkey, as Gebze and Darıca are located within the Kocaeli Province.
Construction began in late 2018, but the inauguration date has been delayed constantly. As of February 2025, the line is expected to open in late 2026.

Network

Most of the metro line will be underground, except for a section which will be at-grade. The line will interchange with TCDD Taşımacılık high-speed and intercity trains along with Marmaray commuter trains to Istanbul at Gebze railway station. A maintenance facility and a control center will be constructed at Pelitli, in north Gebze.
The first of a total of 28 driverless trains was delivered late 2023. Journey time is expected to be 19 minutes and the projected daily ridership is expected to 4,800.

Incidents

On 29 October 2025, during the construction of the metro line, an apartment building collapsed above the Akse Sapağı metro station. Four people died in the incident, and it is suspected that the lack of safety measures in the construction caused the collapse. An investigation is ongoing.