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CBTC on board equipment, including sub-
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systems which are in charge of controlling the speed, traction and braking of the train, and also of managing and supervising communication with wayside equipment. Train to wayside communication subsystem, currently based on radio communication. In addition to these main subsystems, it is
worth noting that communications between CBTC and on-board passenger information systems are becoming more and more complex.
CBTC system can operate in any mode from semi-automatic to fully unattended.
System architecture To allow such a complex system to run requires many components (subsystems) to be interconnected together, both on board and at the trackside. Even if CBTC architecture changes depending on the manufacturer, the following list gives an overview of typical main subsystems of a CBTC system: Wayside equipment, which
includes interlocking and zone controller systems. The control of the system is usually performed from a central command centre.
CBTC benefits Most CBTC suppliers and users agree on the facts that CBTC systems improve: • Transport capacity by optimising use of the infrastructure: track and trains
• System availability • Train operation (regularity and energy savings by implementing automatic driving strategies)
• Lifecycle and maintenance costs. Being a very flexible system, CBTC also
allows an almost completely transparent migration from the legacy system to the new system. For passengers, CBTC means more trains,
improved punctuality, accurate information, greater availability of the system and fewer delays. In other words, it makes the complete system more efficient. Offering expertise in connectivity, Harting
The future of Pw geosynthetics
HYDROTEX™ Permanent Way geosynthetic alternative to the sand blanket, preventing upward passage of small clay and silt particles, preventing sub-grade erosion and ballast degradation:
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An on board backplane produced by Harting Integrated Solutions (HIS) is used as the backbone of a CBTC system
has for many years been continuously involved in this challenging area of technology. The Harting product portfolio offers a
large and comprehensive range of solutions for railway applications. HAN, DIN 41612, D-Sub, hard metric two millimetre, M12 connectors and system cables are examples of the company’s products that are used within numerous train applications. In addition, Harting Integrated
Solutions (HIS) specialises in designing and manufacturing backplanes and subsystems that are used as backbones for the CBTC equipment. Further information from Romaric Thevenet, marketing and technical support, Harting Technology Group. Tel: 01604 827500. E-mail:
gb@harting.com www.harting.co.uk
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Fiberweb Geosynthetics Ltd Tel: +44 (0) 1621 874200
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™ indicates a trade mark of Fiberweb plc or a Fiberweb Group company, many of which are registered in a number of countries around the world.
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