Alstom and RESA A.Ş. have signed a contract to supply Türkiye’s first rigid overhead catenary system (ROCS) for the Halkalı–Kapıkule high-speed rail line. The system will be installed on the Halkalı–Ispartakule section of the line, part of a broader effort to enhance rail connectivity between Türkiye and Europe.
The 229-kilometre Halkalı–Kapıkule high-speed rail line is expected to significantly boost transportation capacity in the Istanbul region, increasing passenger traffic by 80% and freight movement by 45%. It will also form an integral component of the Trans-European Transport Network (TEN-T), supporting both regional economic development and international trade.
The ROCS to be installed by Alstom will be deployed in a double-track tunnel under the local neighbourhoods and Küçükçekmece Lake. Each tunnel will be approximately 7 kilometres long and 8.3 metres wide. Manufacturing of the catenary components is taking place at Alstom’s Valmadrera facility in Lecco, Italy.
“At Alstom, we have been dedicated to developing Türkiye’s railway sector for over 70 years. This new contract with RESA A.Ş. marks another important milestone, combining our global expertise and strong local team. We connect local partners to opportunities arising from Alstom’s projects around the world. Moving forward, we will continue to invest and collaborate to support Türkiye’s vision for rail transportation,” Kerem Bugay, Managing Director of Alstom Türkiye, commented.
The project will also mark the first time that a rigid overhead catenary system is applied in a high-speed rail context within Türkiye. Rigid systems are particularly well suited for tunnels and confined spaces due to their compact form, low maintenance requirements, and high fire resistance.
“As RESA A.Ş., we have been serving the railway sector in our country for long years. With the construction of the Rigid Catenary System for the Halkalı–Ispartakule High-Speed Train Project, which we have undertaken as a turnkey project, we are adding another milestone to our services. This project holds great significance as it will be the first high-speed train project in Türkiye to implement a rigid catenary system, and we are especially proud to be the first company in our country to carry this out. We are pleased to elevate our strong collaboration with Alstom to a new level through the Halkalı–Ispartakule High-Speed Train Project, following the ongoing Ümraniye–Ataşehir–Göztepe and Gebze–Darıca Metro Projects,” Serkan Atalar, Managing Director of RESA A.Ş., added.
Alstom’s ROCS technology uses an aluminium conductor profile in combination with a copper contact wire, offering efficient power delivery and reduced lifecycle costs. Its adaptability across voltage types and compatibility with existing rail lines make it a versatile solution for modern railway infrastructure.
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