Koleje Mazowieckie has signed a contract with Stadler Polska for 11 additional FLIRT electric multiple units, extending the regional operator's reliance on the Swiss-designed EMU family for services in the Mazowieckie region around Warsaw.

The agreement adds to the FLIRT fleets already operated by Koleje Mazowieckie, the regional rail operator serving the Polish capital's catchment area. Stadler Polska will build the units at its plant in Siedlce, east of Warsaw, although the contract announcement did not specify delivery dates, unit price or the total contract value.

For Koleje Mazowieckie, the order addresses persistent capacity pressure on regional services in one of Poland's most densely populated rail markets. Additional EMUs allow the operator to lengthen trains on crowded routes, replace older rolling stock and add frequencies without requiring separate locomotive-hauled sets.

The FLIRT platform, in service with operators across Europe, offers distributed traction and low-floor boarding, which shortens dwell times at stations and improves accessibility — operational characteristics that matter for the high-frequency commuter flows Koleje Mazowieckie runs into Warsaw.

The contract reinforces Stadler's position in the Polish rolling stock market, where its Siedlce factory has supplied multiple operators with FLIRT-family units. Poland's regional operators have invested heavily in new EMUs over the past decade, supported by EU cohesion and infrastructure funding channelled through Polish regional governments, and Mazowieckie has been among the most active buyers.

Details still to be confirmed include the delivery schedule, the specific FLIRT variant ordered, seating capacity per unit and any maintenance arrangements bundled into the contract. Koleje Mazowieckie and Stadler Polska may disclose these terms as the order proceeds toward first deliveries.