Is it possible to
nearly double traffic capacity of the existing underground lines, at that
ensuring more conveniences for passengers, whose quantity is steadily
increasing every year? We are answering this question in the affirmative
manner and submitting for consideration two solutions.
In the first variant it is supposed to extend the height of the underground
tunnel by one and a half-two meters and running of double-deck coaches
at least in rush hours. Boarding on these coaches can be performed from
a two-storied platform or, for example, one can go up to the second deck
from the central door. Of course, passengers traveling long distances
will prefer to go up to the second deck. In order to minimize soil excavation,
construction of the second deck can be provided with a minimal required
height, only with sitting places. For deep line tunnels increase in height
can be carried out practically without problems, and for shallow line
stations and tunnels will be needed every inch of height.
The second variant supposes separating the tunnel on two parts - two floors
after extending tunnel height. On the lower floor will be running an ordinary
subway train, and the upper floor will contain an underpass for high-speed
locomotives or several coaches with 3-4 stops on the underground line.
In our opinion, using a string transport providing a speed of 300-400
kilometers an hour in the upper floor will have great prospects.
Using bearings of 10-30 meters high, starting from an airport up to terminal
stations in outlying districts, and then as though diving under the ground
into the upper floor of subway tunnel, the string transport (imagine an
elongated minibus of streamlined form) as an underground taxi can take
people to a downtown or to an airport in just few minutes. High-speed
underground taxis have great prospects in large cities as the only means
of high-speed transportation.
Without doubt, when building new subway lines an optimal solution will
be construction of tunnels, height of which will allow passing of double-deck
coaches and one (or more) underpass for high-speed underground taxis.
That is our vision of the future underground.