Feasibility study for the refurbishment and extension of the Millennium Underground Railway, metro line M1


Technical data

Building trades

road design
traffic engineering
railway and catenary design
utility design
electrical and mechanical design
bridge and structural design


BKK Zrt.

Project value


Design value

376.90 millió Ft

Years of completion

2013 to 2015

Years of construction

2017 to 2022

The first underground on the Continent, the Millennium Underground Railway, metro line M1, has been carrying passengers since 1896. Its vehicles have been running since the upgrading of the line in 1973, now reaching the end of their life cycle. The line and the stations were refurbished in 1995 with the care a listed structure deserves. As a result, the line operates satisfactorily, but today’s demand set new requirements for the facility protected as a World Heritage Site.
The purpose of the Feasibility Study commissioned by BKK was to compile a comprehensive development proposal for the replacement of the vehicles, as a result of which the key transport facility originating from the era comprising the millennium of our country’s history can continue to serve the coming century as an efficient and modern means of the capital conforming to European norms. In addition to establishing state-of-the-art transport solutions, such as connections accessible by the disabled, comfortable vehicles and good transfer connections, the most important goals at the World Heritage Site were to protect the built environment and to preserve the platforms of special architectural interest. For the extension of the line, we regarded the enforcement of area development and environmental considerations and, in addition to transport benefits, the enhancement of the values of the built environment as high priority tasks. The work was performed with the participation of architect, environmental and economic specialists.


  • Pre-decision study;
  • Preliminary archaeological documentation and cultural heritage assessment;
  • Technical study;
  • Detailed feasibility study.


  • a line running along the service road of metro line M3;
  • a line to be established in the area of the Rákosrendező Railway Station;
  • a line reaching one of the main hubs in Zugló, the intersection of Nagy Lajos király útja and Erzsébet királyné útja.

Area development can only be brought about by the Rákosrendező alternative, but if it is implemented in the near future, its effect will be overridden by transport benefits, thus the design of the alternative of extension along the M3 Motorway was continued.

Development of the existing line:

  • making the stops accessible for the disabled and establishment of lifts and new exits;
  • upgrading of stops: establishment of a new passenger information system and ticket vending machines;
  • upgrading of the signalling systems of, and power supply to, the line and the car depot;
  • upgrading of the car depot in accordance with the technology required for the new vehicles;
  • increasing the number of transfer connections: construction of a new stop at Hungária körút to provide connection to tram line 1;
  • establishment of a track connection for occasionally releasing a historic vehicle into traffic

Extension of line:

  • extension of the line westward to Vigadó tér with the construction of a new terminal to provide transfer connection to tram line 2 and boat services on the Danube;
  • extension of the line in a north-eastern direction in two stages, first to Kassai tér, then to the Marcheggi Bridge of the Belt Railway Line, with the construction of six new stops in total, the reconstruction of the Mexikói út terminal as a stop at a new location, partially run at street level;
  • establishment of a transfer connection with extended tram line 3 at Kassai tér;
  • Establishment of a P+R car park at the Marcheggi Bridge.

New vehicles:
Due to the non-standard size of the tunnel, the procurement of only vehicles developed for this line can be considered: the proposed new vehicles are trainsets comprising five cars that provide a single, air-conditioned passenger compartment with passage between the two ends, suitable for surface transport, provided with modern ticket-vending and passenger information systems, and suitable for recovering braking energy. Its allowable operating speed is 50 km/h. The total length of the trainset is 34,900 mm, 4.5 m longer than the current one. The trainset has six doors, and the net passenger compartment length is increased to 27,800 mm. (It is 21,390 mm today). The increased passenger compartment has a total capacity of 205 passengers, representing a 27% increase. Fifty seats are available, and four wheelchairs for the disabled can be accommodated. The procurement of vehicles will be handled as a separate project.

With the proposed development, the new Millennium Underground Railway setting out from the City Centre, reaching the outer districts along the main tourist axis of the city, establishing connections to the components of the public transit network and extended to the Belt Railway Line will be able to meet the requirements of the 21st century by keeping its values established in 1896 and retained during its multiple upgrading. With its new, modern vehicles, stations accessible by the disabled and transfer facilities connecting key tram lines in the city, it can also serve a new travelling public, which have seen ‘only’ a tourist attraction so far in the transport facility, which has been performing with predictable reliability since the millennium anniversary.