Kocaeli Gebze - Darica Metro Line



Ministry of Transport and Infrastructure

15,6 KM

Features / Capacity / Area
15,4 km / 13 Stations / 1 Depot and Maintenance Facility

Contract Date
2018 September

The Gebze – Darica Metro Line represents a significant advancement in public transportation, connecting the Gebze and Darica districts of Kocaeli province with a modern rapid transit system. This groundbreaking project includes 13 stations of tunnel and cut-and-cover type, spanning approximately 15.4 kilometers of main line tunnels, along with a depot and maintenance area. Notably, this metro system marks the first network to extend beyond a provincial capital in Turkey, serving as a pivotal development for the Kocaeli Province.


At Gebze railway station, the metro line will provide seamless interchange with high-speed and intercity trains, as well as Marmaray commuter trains to Istanbul, enhancing connectivity for commuters. The implementation of new generation technology (GOA4) in the form of a driverless rail system ensures the highest standards of efficiency and safety for passengers. This innovative approach also allows for increased trip frequencies, facilitating more convenient and reliable transportation options for residents and visitors alike.


The project is carried out using Building Information Modeling (BIM) system.


Preliminary, final and detail (construction) design services for the metro rail system have been prepared by Prota.


The design services provided by Prota within the scope of the project are summarized below:

  • Alignment, rail and track design
  • TBM, NATM and cut-and-cover tunnel
  • Architecture, interior design and finishing works
  • Structural systems
  • Geological and geodetic studies, geotechnical studies, reports and excavation shoring projects
  • Mechanical ventilation, heating-cooling, plumbing systems,
  • Fire projects (station and tunnel fire detection and fighting, gas-water extinguishing, smoke removal and escape route pressurization)
  • Electrical Projects (3rd rail, power installation, low voltage, MV system, lighting, socket, UPS, routing and grounding system projects)
  • Power supply, traction transformers and ring system
  • Communication design (KDTV, announcement, passenger information, emergency call, clock, radio system, driver platform monitoring, entrance security, line-wide radio system, tunnel radio and fiber optic cabling)
  • Acoustic Modeling Reporting (building acoustics, line vibration, noise analysis)
  • Environmental planning (landscape, road-traffic regulation, traffic displacement, Infrastructure and infrastructure displacement and drainage)
  • CFD, SES, piston effect simulations
  • Signaling and safety system
  • Zoning plan amendment proposals, expropriation documents
  • Scada system
  • Depot and maintenance facility design
  • BoQ and technical specification preparation
  • Technical consultancy for construction works
  • As-built drawings

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