Proceedings 2002/2003 - IRSE

80
CTRL SIGNALLING AND COMMUNICATIONS
• the speed to be obeyed at least at the end of the
next block section.
The on-board system interprets this code using
another table, which is specific for each network and
each type of train. This gives the indication to be
displayed in the driver’s cab and the intervention
speeds at the entrance and the exit of the block
section for the intervention curve.
For the Eurotunnel application, there are the
following on-board tables:
• one speed code table for Eurostar;
• one speed code table for Eurotunnel Shuttles;
• several speed code tables for Class 92:
– MA100 (freight train 750m long);
– ME120 (freight train 750m long);
– ME140 (freight train 500m long);
– V140 (passenger train)
– (etc).
In fact, for each information, the on-board system
chooses the tables to be applied (distance, gradient
and generic speed codes) depending on the network
code and, in the case of freight trains, the train type
which the driver must enter using his keyboard.
For CTRL Section 1, five on-board tables will be
required:
• a distance table (which may be the same as for
the LGV);
• a gradient table (which may be the same as for
the LGV);
• a speed code table for Eurostars on CTRL
Section 1;
• a speed code table for Class 92s (only ME140,
freight train 500m long on CTRL Section 1);
• a speed code table for the Reserved Domestic
Operator (RDO) on CTRL Section 1.
As the block section lengths on CTRL should be
similar to the French LGV, it seems possible to use
the LGV distance table (to be confirmed during the
basic design). This table does not exist for Class 92
and will have to be created.
As gradients on CTRL should be similar to the
French LGV, it seems possible to use the LGV
gradient table (to be confirmed during the basic
design). This table does not exist for Class 92 and
will have to be created.
It is impossible to use the LGV code table for
Eurostar. There will be speed bands on CTRL that do
not exist on LGV (100 km/h for example). Moreover,
providing for freight trains requires additional codes.
For example, a speed of 170 for Eurostar could
translate to 100 or Green Flashing for Class 92
depending on the signalling sequence, so that there
will be two different codes for 170. The new speed
code tables will be implemented on Eurostars and
Class 92.
As new tables are required, the distance table and
gradients have been optimised for CTRL Section 1
specifically. See tables on next page.
CTRL SIGNALLING PRINCIPLES
As explained earlier in this paper, the interlocking
and cab signalling principles applied on CTRL are
specific, and different from the Mediterranean high
speed line. Hence a new set of principles has been
implemented within the application layer, without
modifying the generic layer and its SIL 4 software.
Same as the one implemented
on LGV Med and
Generic Layer
potential other SEI/ITCS
Application Specific Layer
Site Data Layer
ITCS Architecture
CTRL Signalling
Principles implementation
in any CTRL
Section 1 ITCS
Geographical data
OVERVIEW OF SECTION 2
The same ITCS system will be implemented on
Section 2. The signalling architecture should be the
following:
The ITCS at London Portal will deal only with cab
signalling functions, and will be linked to the St