Projects M3 metro line renovation
HD 230320 NM 3750 (1)
  • HD 230319 NM 3584
  • HD 230521 NM 8286
  • Hd 227 220514 DT 6903
  • Hd 149 220514 DT 6470
  • Hd 110 220514 DT 6298
  • HD 230122 EM 7656
  • HD 230122 EM 7342
  • HD 230319 NM 3522
  • Hd 186 220514 DT 6616
  • HD 230320 NM 3750
  • HD 230319 NM 3310

SWIETELSKY worked for three years on the renovation of the central section of the M3 metro line, on the deep‑level tunnel stretch between Lehel tér and Nagyvárad tér, which includes nine stations. The reconstruction covered the entire infrastructure: the stations, the station track zones, the main ventilation structures, as well as the associated high‑voltage electrical and mechanical systems.

The works posed significant professional challenges, as this section of the metro line has a history spanning several decades (the Deák Ferenc tér – Nagyvárad tér section opened on 31 December 1976, and the Deák Ferenc tér – Lehel tér section on 30 December 1981). One of our experienced colleagues who participated in the project had also worked on the original construction of the M3 metro some forty years ago. This investment was of outstanding importance, as this part of the line runs through the heart of Budapest and plays a crucial role in the city’s daily public transport.

The main elements of the renovation focused on the architectural renewal of the stations and the complete replacement and comprehensive modernisation of the electrical and mechanical systems. Structural elements and their waterproofing were improved, and modern fire protection systems were installed. The stations received new floor, wall and ceiling coverings, new doors and windows, and state‑of‑the‑art lighting solutions.

One of the most important aspects of the reconstruction was accessibility. As part of this effort, inclined elevators were installed next to the new escalators—an unprecedented solution in Hungary and unique even at the European level—and platform gap fillers were introduced, making all stations in the central section fully accessible. Passenger safety and operational modernisation were also given special attention. During the complete renewal of the electrical and mechanical systems, modern ventilation, smoke extraction, power supply, firefighting and safety equipment were installed, all operating in accordance with current technical and safety