Providing relief to the public transport network
One-third of passengers travel on five of the 179 lines available: the U6 and U3, trams 43 and 6, as well as bus 13A. The U1, U4, 44 and 14A…
Elevated underground lines
None of the planned U2/U5 routes will be elevated, largely because the urban area above is far too dense. It was possible to have parts of the U1, U2 and…
The cut-and-cover tunnelling method
In the cut-and-cover method, a digger or a milling machine cuts slots in the ground that are then filled with concrete. These will later form the side walls of the…
Construction methods
There are different methods for building an underground tunnel. These depend on how deep the line is, the soil it passes through and whether there are any buildings on the…