SWS performed design verification in Joint Venture with Italferr as Independent Design Verification Engineer under Marmaray CR3 Contract, Gebze – Halkalı Commuter Rail Upgrading: Civil & Electrical & Mechanical Systems.
The whole line contains 43 stations to connect Asia and Europe, with the already existing tunnel under Bosphorus. Thanks to this project, the travel time from Gebze to Halkalı is reduced to 115 minutes from 185 minutes.