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Chinese Train Control System

The Chinese Train Control System (CTCS, Chinese: 中国列车控制系统) is a train control system used on railway lines in People's Republic of China. CTCS is similar to the European Train Control System (ETCS).

It has two subsystems: ground subsystem and onboard subsystem. The ground subsystem may based on balise, track circuit, radio communication network (GSM-R), and Radio Block Center (RBC). The onboard subsystem includes onboard computer and communication module.

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CTCS Levels

There consists of 5 different levels (Level 0 to Level 4).

Levels 2, 3, and 4 are back-compatible with lower levels.

CTCS Level 0 (CTCS-0)

For railway lines where operational speeds are below 120 km/h (75 mph):

  • Track configuration: Track circuit
  • Cab configuration: CTCS Universal Cab Signalling (UCS) + Train operating service unit (TOSU/LKJ) + Driver Machine Interface (DMI).23

Level 0 is used on lines with conventional trackside signalling. Train drivers follow trackside signals primarily, with cab signals as back-up. UCS receives train fixed block occupation signals from track circuits and is shown as cab signals using digital signal processes. TOSU/LKJ is used to supervise speed limits and can only advise train drivers on braking curves. The drivers are mainly responsible for maintaining train speed protection.45

CTCS Level 1 (CTCS-1)

For railway lines where operational speeds are below 160 km/h (99 mph):

  • Track configuration: Track circuit + Balise
  • Cab configuration: Primary cab signalling + ATP + Enhanced Safety Train Operation Supervision and Recording Device (LKJ) + DMI + Recording units + Balise Transmission Module6789

Balises are installed in addition to track circuits. Automatic train protection (ATP) is enabled on CTCS level 1.1011 Drivers use cab signals as primary signals.12 Train circuits are responsible for detecting track occupancy and integrity. Temporary speed restrictions, train positions and track data are provided intermittently.

CTCS Level 2 (CTCS-2)

For high-speed railways where operational speeds are below 250 km/h (160 mph):

  • Track configuration: Track circuit (ZPW/UM) + Balise + Lineside Electronic Unit (LEU) + Train Control Centre (TCC) + Temporary Speed Restriction Server (TSRS)
  • Cab configuration: ATP + Vital Computer (VC) + Specific Transmission Module (STM, for receiving track circuit information from non-CTCS-2 systems) + BTM + DMI + Speed Detection Unit (SDU) + Recording units1314

The track circuit is used both for train occupation detection and movement authorization, its architecture is similar to TVM-300.15 Balises and track circuit serves to provide intermittent trackside information and automatic train protection (ATP) to cab equipment. Trackside signalling is not mandatory and can be replaced with cab signalling using DMI. LKJ can be equipped as redundancy on CTCS-0 lines. Minimum headways on CTCS-2 is 180 seconds.16

This system is compatible with ETCS-1.

CTCS Level 3 (CTCS-3)

For high-speed railway of above 250 km/h (160 mph):17

  • Track configuration: Track circuit (ZPW/UM) + Balise + LEU + Radio block control (RBC)
  • Cab configuration: VC + GSM-R Radio transmission unit (GSM-R RTU) + BTM + DMI + SDU + Recording units

CTCS-3 introduces GSM-R radio for bidirectional data transmission.1819 Track circuits are used as a redundant system to CTCS-3. Train positions can be accurately calculated using balises and onboard odometers which are transmitted to Radio Block Centres (RBCs).20 Authorisation of train movement is created by RBCs and transmitted onto on-board cab equipment using GSM-R.2122 Using both trackside equipment and onboard equipment, ATP can be achieved. Trackside signalling is not mandatory and can be replaced with cab signalling using DMI. It is considered to be a "quasi-moving-block" system.2324

This is currently in use for all of the 200–250 km/h (120–160 mph) lines on China's high-speed railway system, with a backup system of CTCS-2. CTCS-3 is equivalent to ETCS-2.2526

CTCS Level 4 (CTCS-4) (proposed)

  • Track configuration: Radio block control (RBC)
  • Cab configuration: VC + GSM-R RTU + SDU + DMI + Recording units + GPS (or other positioning systems) + Train integrity detection device

It would feature the complete elimination of track circuits, moving blocks and self-train-integrity-check, which would significantly reduce the number of conventional track signalling equipment needed. Train integrity would be completely detected entirely through CTCS-3. Data transmission would be performed on GSM-R or LTE-M. Trackside signalling is not mandatory and can be replaced with cab signalling using DMI.2728

Currently, Level 4 is not in use on any tracks and exists only as a conceptual system equivalent to ETCS-3. It is being developed and defined by signalling manufacturers in China.2930

See also

References

  1. Hitachi Rail - Hitachi wins contract to supply Automatic Train Protection (ATP) system for China's dedicated high speed passenger line Archived 2010-03-10 at the Wayback Machine http://www.hitachi-rail.com/rail_now/hot_topics/2008/081020/index.html ↩

  2. Bin Ning (2003-12-08). "Intelligent Control In Railway Network". Beijing Jiaotong University. Archived from the original on 2012-04-23. https://web.archive.org/web/20120423164058/http://www.ertico.com/download/bits_documents/day1_01.ppt ↩

  3. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  4. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  5. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  6. Bin Ning (2003-12-08). "Intelligent Control In Railway Network". Beijing Jiaotong University. Archived from the original on 2012-04-23. https://web.archive.org/web/20120423164058/http://www.ertico.com/download/bits_documents/day1_01.ppt ↩

  7. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  8. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  9. The newer source (2016) says ATP is installed on CTCS-1 while the source from the previous year (2015) does not say so. ↩

  10. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  11. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  12. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  13. Wang, Changlin. "Chinese High Speed Railway Train Control System" (PDF). Electrical and Mechanical Services Department, The Government of Hong Kong SAR. Retrieved 2022-08-15. https://www.emsd.gov.hk/minisites/symposium/2011/session/ppt/M4_PPT_CL%20Wang.pdf ↩

  14. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  15. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  16. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  17. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  18. "Beijing - Tianjin elevated design anticipates 350 km/h". 2006-03-01. Archived from the original on 2012-07-28. https://web.archive.org/web/20120728213430/http://www.railwaygazette.com/news/single-view/view/beijing-tianjin-elevated-design-anticipates-350-kmh.html ↩

  19. Bin Ning (2003-12-08). "Intelligent Control In Railway Network". Beijing Jiaotong University. Archived from the original on 2012-04-23. https://web.archive.org/web/20120423164058/http://www.ertico.com/download/bits_documents/day1_01.ppt ↩

  20. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  21. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  22. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  23. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  24. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  25. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  26. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  27. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  28. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩

  29. Lv, Jidong; Chen, Lei; Tang, Tao; Zhao, Ning (September 2016). "Chinese train control system principles" (PDF). IRSE News (225): 2–5. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?Refno=-1442186958&GroupMembers={04%20IRSE%20NEWS%20-%20all%20papers}{11%20Cab%20sig%20(inc.%20ETCS/CBTC)}{13%20Signalling%20Principles}{16%20Train%20Prot.%20Systems}{IRSE%20NEWS%20-%202016%20papers%20*}_&document=IRSE%20News%20225%20(Sep%202016).PDF ↩

  30. Xue, Anthony Weiqing; Cui, Sara; Yan, Fei; Yi, Haiwang (April 2016). "The New Development of CTCS in the Intercity Railway" (PDF). IRSE News. Retrieved 2022-08-15. https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?id=82&RefNo=1462697577&document=2.12%20Development%20of%20the%20Chinese%20Train%20Control%20System%20(CTCS)%20-%20Anthony%20Xue.PDF ↩