Before building a way, let us find the main requirements for it.
- Single breakdown can't block the traffic in other direction.
- In case of no breakdowns, a way in any direction is granted.
- A way's capacity can be increased in any direction if necessarily automatically (with a penalty to the capacity in other direction).
- Trains reversing ability.
|7.1||Three-line way||7.2||Three-line ways T-junction|
BETA version, under testing!
The three-line ways is an experimental construction of a way with a high capacity. It requires TTDPATCH to be used, because it's build on pre-signals. It looks complicated, but it's very simple. One line A in one direction, one line G in the other direction and one line H for both the directions. The power of the construction is in the control of trains' appearance at the H line. A system of pre-signals moves the trains to line H when their way becomes busy (e.g. with broken train) using block I and removes them back from the line if another train requires the line using block K/L (standard situation) or block J (extremal situation). A M depots are used for regular service or extremal situation.
T-junction of the three-line ways is the powerful 4-level construction. Its building has to be well planed and designed before construction both the three line ways, because it's hard to connect three-line ways to it, they has to be build from it.
The most important part of the T-junction is the mandatory servicing depot N, which prevents appearing of a trains ring in the middle of the T-junction and a directed crossing O at the top level of the t-junction. Without it, traffic jams would appear quickly.
Intersections of three-line ways are not designed yet.