ZSSK Launches €9.32M ETCS Retrofit Tender in Slovakia

BRATISLAVA, Slovakia – ZSSK launched a public tender to equip 10 Class 757 diesel locomotives with ETCS Level 2 Baseline 4 onboard equipment, valued at an estimated €9.32 million excluding VAT. The per-locomotive cost equates to €932,000, calculated from the tender value. Bids must be submitted by 3 September 2026, with a 36-month implementation period.

What Does This Contract Cover?

The contract covers the supply, installation, and authorisation of ETCS Level 2 Baseline 4 onboard systems on 10 Class 757 diesel locomotives. ZSSK described the €9.32 million figure as an estimate for launching the procurement, with the final price set after evaluation of compliant bids using the lowest-price criterion.

The Class 757 fleet, modernised from former Class 750 vehicles, operates Ponitran express trains between Bratislava-Nové Mesto and Prievidza and Gemeran services connecting Zvolen and Košice, including mixed electrified and non-electrified sections. The retrofit is part of Slovakia’s Action Plan for Increasing Railway Transport Safety, approved in December 2025, under which ZSSK expects to operate 178 ETCS-equipped locomotives and trainsets once all projects are completed; the current tender covers 5.6% of that target fleet.

ZSSK did not disclose the preferred ETCS supplier, any option for additional locomotives, or the funding split among the Slovakia Programme, other EU schemes, the state budget, and operator resources.

Key Contract Data

ZSSK’s tender notice sets the estimated value at €9.32 million, with the final contract price determined after bid evaluation.

How Does This Compare to Similar Contracts?

Europe’s rail signalling market is estimated at roughly €20 billion in 2025, with the region accounting for nearly half of global demand driven by the modernisation of ageing networks (Source: RailMarket, 2025). At €932,000 per locomotive, the ZSSK retrofit sits in the mid-range of European ETCS onboard projects, although ZSSK did not publish its full budget assumptions for systems integration, cabling, and authorisation testing.

A contrasting model is visible in Switzerland. Montreux–Vevey–Riviera Transport awarded Stadler a contract in October 2025 to equip the Montreux–Rochers-de-Naye rack railway with the Nova Pro signalling system, bundled with the supply of eight new panoramic trainsets entering service from 2029 to replace 40-year-old stock (Source: Railway Gazette, 2026). ZSSK is pursuing a lower-capital retrofit path — signalling-only upgrades on existing locomotive platforms — whereas the Swiss project bundles control systems with full fleet renewal.

Wider European rail investment is accelerating, with the UK market projected to reach USD 185.31 billion by 2034, expanding at a CAGR of 6.65% from 2026 to 2034 on the back of passenger demand and government-backed improvement programmes including digital signalling (Source: Market Data Forecast, 2025).

Editor’s Analysis

ZSSK’s retrofit-only approach on a 10-locomotive batch signals a deliberately incremental digitalisation strategy. Instead of committing to a fleet-wide programme in one tender, the operator is testing ETCS Baseline 4 on a small series before extending it to the remaining 168 locomotives and trainsets in its stated target fleet.

By specifying Baseline 4 rather than an earlier baseline, ZSSK aligns with the latest EU Technical Specifications for Interoperability, a position that matters as European signalling investment shifts further toward software-based and digitally integrated systems (Source: RailMarket, 2025). The open lowest-price selection process, however, introduces uncertainty about the final system integrator — a decision that will shape the reliability, maintenance cost, and scalability of ETCS adoption across the rest of the fleet.

FAQ

Q: How much will the ETCS retrofit cost per Class 757 locomotive?
A: The tender value of €9.32 million across 10 locomotives equals roughly €932,000 per unit. The final contract price will be determined after the evaluation of compliant bids.

Q: When will the ETCS-equipped Class 757 locomotives be in service?
A: With bids due by 3 September 2026 and a 36-month implementation period, the earliest service entry would be late 2029, provided contract award proceeds promptly after the tender closes.

Q: Which routes will get ETCS-protected diesel traction first?
A: The Class 757 fleet currently operates the Ponitran (Bratislava–Prievidza) and Gemeran (Zvolen–Košice) services, but ZSSK has not officially confirmed the first deployment routes after the retrofit is completed.