• cm3 622
  • cmatrio 622
  • cmbanchina 622
  • fotopiano 622
  • cm3 622
  • cmatrio 622
  • cmbanchina 622
  • fotopiano 622

Rome metro b

Country ITALY-Latium
Client Comune di Roma
Services provided Preliminary design, final design
Period of execution 2004-2008
Construction cost € 395,840,480.85

3.6 km rail line
3 stations
terminal for rolling stock 30,000 mq
multi-storey car park for 3,360 vehicles
“Centrale del Latte” Road Interchange on the Great Ring Road


The B line of the Metro is one of the two undergrounds in Rome, serving 300,000 passengers per day.
Its extension has been planned in order to extend the transport network to the booming districts of the urban fringe beyond the Great Ring Road, in the East quadrant of the city.


The design of the new underground extension becomes an opportunity for important contributions on the road and infrastructure system, and for redevelopment of the urban environment: the result is that the project, which initially focused only on the metro, has been progressively extended in order to have a comprehensive functionality toghether with other investments.
The architectural sign of the stations is strong: in this area of Rome it is not necessary a minimalistic approach - not to overwelm the richness of what's around - but a firm will to attract attention. The stations are open, accessible, bright and are located at the center of existing urban open spaces, and create new landmark items with their parabolic glass roof.
The main difficulty in the design was the choice of the alignment, because of the nature of the site (an already urbanized area): the goal was to preserve all existing buildings while obtaining an alignment as linear as possible.
For the rail tunnels, the design envisages a “top-down” cut and cover excavation method, single-tube with double track, except for a stretch of about 1 km and the terminal, in open trench.
In addition to the assessment of the alignment and of the excavation method, the difficulty lied mainly in the resolution of major interferences.
In this sense, the underpass of the Ring Road (GRA) is a critical point: in view of the strategic role that the artery represents, the objective of the design solution is to minimize interference with road traffic.
In particular, to avoid any suspension or limitation to traffic operation, it is expected that the underpass is realized with a prefabricated 87m long r.c. structure, launched by means of a "hydraulic jacking" technique.
Of particular interest is the new Centrale del Latte road Interchange, for which the traffic simulations carried out have shown that the optimal way to manage high-volume vehicle flows involves the construction of a new grade-separated interchange.
The working sites have been identified trying to minimize the inconvenience caused to users, and sacrificing as little as possible the areas involved: the urban fabric is highly urbanized, making it difficult to find suitable large areas, but this aspect has been solved efficiently.


Provided in collaboration with Siteco S.r.l.- A2G pscrl – Geodata S.p.A

  • Feasibility study
  • Preliminary design
  • Final design
  • Environmental Impact Study