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Please note, the address of this page has changed to www.tsd.org/cbtc/
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The following information is out of date:
List & Discussion Forum
View and join discussions on CBTC and related technologies
CBTC-related news and views
Suppliers, Products, Interface standards
CBTC Transit projects worldwide
Suppliers, Products, FCC info
|Positive Train Control
US & worldwide
US & worldwide
Traditional Signaling & CBTC Courses
|Safety and Software
CBTC and related papers
To the best of our knowledge the information
below is accurate as of February 2003. If you have any corrections or
please contact Tom Sullivan. Also, please let these firms know you learned about them from the tsd.org web site!
Kevin Fitzgerald RF
Based on LZB
15 DEC 2000
Alstom URBALIS 300 Naor Wallach Proprietary Eurobalise
15 DEC 2000
IP -based RailPath DCS
Flexiblok® David Jarosh Proprietary
- NA Contracts at SEPTA & SFO possibly also SEA-TAC GE
CBTC & AATC:
GPS & Tachometer
Railroad and Rail Transit CBTC.
See AATC discussion below
Nippon Signal Makoto
(Powerline physical layer)
- NA CBTC trainline communications subsystem systems with GE Safetran Systems TBS100 John
- NA Focus primarily on US Railroads and PTC Siemens France
Jon Bader IL and RF
New Proprietary Tag
29 NOV 1999
IP -based RailPath DCS
Desiro for UK
NA Many LZB installations worldwide US&S (1) Denny
NA Working with Siemens/Matra JV for NYCT Westinghouse
"A further software upgrade allows migration to moving block."
PTC - IDOT
(Comms subcontractor to Lockheed Martin)
Robert Kull IEEE 802.11
Mobile Satellite Multiple UHF Data Radios
AAR Standard ECP Brakes
IEEE-1473-L Brake Watchdog Monitor
The information below is based upon information tsd.org believes is correct as of November 20002. We often receive updates and enhancements from our visitors so please let us know of any changes or enhancements to the information.
TSD's "Evolution of Railway Signaling Companies and CBTC Products"
1 - NYCT selected Matra /US&S to lead its CBTC Canarsie Line project. Project partners include MATRA/Siemens, Union Switch & Signal/Ansaldo and Telephonics.
Ansaldo Signal is the Netherlands holding company for Ansaldo Signalamento Ferroviario in Genoa, Italy; AT Signal System in Spanga, Sweden; CSEE Transport in Les Ulis, France; Union Switch & Signal in Pittsburgh, PA USA; and Union Switch & Signal Pty. Ltd., in Brisbane, Australia. Prior to being purchased by Ansaldo, US&S purchased Transcontrol. Ansaldo Signal is a holding company reporting to Italian government-controlled Finmeccanica responsible for maximizing profits in the signaling industry. Ansaldo is no longer a public company. In April 2000, Ansaldo Transporti bought out mostly US stockholder's 4 million shares valuing the company at under $80M.
Alstom (formerly GEC Alsthom) purchased French signaling firm Jeumont Schneider in the mid-1970s. In 1998, Alstom purchased SASIB Railway of Italy (which in turn owned the US firm General Railway Signal based in Rochester, NY). In 1998 the original GEC (UK) and Alsthom (France) partnership floated shares on the market to reduce its participation in GEC Alsthom to 24% or less.
Formerly ITT SEL, Alcatel Canada's key CBTC product, Seltrac, evolved from LZB which means Continuous Train Control. Original LZB trackside equipment was developed and manufactured by Alcatel (Germany) under the designation LZB 172. Train based equipment was a joint development of Alcatel and Siemens designated now as LZB 80.
Like Siemens and Alcatel (which jointly developed LZB), Alstom and BTR developed common triple modular redundant Solid State Interlocking architecture. The original SSI units accept hot-swappable modules and has been a standard for RailTrack in the UK for many years. Older TFMs (Trackside Functional Modules) are interchangeable between suppliers -- good news for buyers who desire not to be tethered to one supplier for spares but unfortunately newer units appear incompatible and not interchangeable.
SACEM, a fixed-block overlay train control system has its roots in a 1980's development led by RATP for RER. Three firms developed SACEM: (1) CSEE (now part of Ansaldo), (2) Matra Transport (now owned by Siemens), and (2) Jeumont Schneider (purchased by GEC Alsthom which later became Alstom). In 1998, French courts denied Matra's claim only it could use the name SACEM. Derivatives of SACEM have since evolved each incorporating changes requested by customers. As a consequence, newer versions of SACEM are all incompatible. The original Algol source code for SACEM remains in the public domain. TSD understands that in 1993 Matra ported its SACEM source code to Ada which has since formed the y basis for the inductive loop CBTC system Siemens now calls Meteor. Siemens plans to integrate Meteor with a new RF-based Digital Communications System (DCS) and use DS-SS for NYCT's Canarsie Line project. We have heard that RATP may hold some intellectual property rights to the Meteor technology. TSD welcomes input, comment and updates on this subject.
DaimlerChrysler purchased ABB's share of Adtranz early in 1999. In 2000, DaimlerChrysler sold its Adtranz group to Bombardier and the transaction was completed in April, 2001. In 2003 it remains unclear if Bombardier will continue to market Flexiblok as a separate train control system. Previously, Adtranz was a merger of ABB (Sweden) and Daimler Benz (Germany). Prior to that, ABB purchased AEG Westinghouse (Germany) which in turn had previously purchased the Transportation Division of Westinghouse Electric Corp. (WELCO - US). WELCO provided the train control for SF-BART and Sao Paulo, METRO based upon an advanced failsafe time division multiplex system. CMW Equipmentos based in Brazil is now owned by Alstom. The "W" in CMW came from a prior relationship with Westinghouse Electric Corp.
In 1999, GE Harris (a 50-50 partnership) purchased Rail Safety Engineering (US) and also Syseca but circa 2002 the Syseca group was sold to ARINC. In September of 2000 GE Harris purchased Harmon and renamed GE Harris Harmon. In mid-2001, GE purchased its "Harris half" creating a new GE subdivision known as GE Transportation Systems (GETS). The signaling piece under this group (previously known as Harmon Industries) is now called "GETS Global Signaling." In the late 1990's, Harmon enhanced and cost-reduced an advanced military radio network system known as EPLRS based upon technology first developed by Hughes Aircraft (which later was sold to Raytheon) for the US Army and Marines. The original Hughes development of EPLRS was completed under a contract for the US Department of Defense exceeding US $500,000,000.00. Today, GE's EPLRS radio network is an integral part of its CBTC transit product known as Advanced Automatic Train Control System being developed for SF BART. GE's advanced EPLRS radio network is also sold separately from its AATC train control.
Safetran Systems (US) and Westinghouse Signals UK's parent was formerly BTR Rail. In February, 1999 BTR and Siebe merged to form Invensys. With 100,000 employees, Invensys has four main divisions: Intelligent Automation, Industrial Drive, Power Systems and Controls. Invensys also owns Triconex a manufacturer of triple modular redundant safety computer systems that are also used with IEEE-1473-L technology to control and monitor nuclear reactors.
Westinghouse Signals Ltd, Westinghouse Signals Australia, Safetran and Dimetronic have been members of Invensys Rail Systems since BTR merged with Siebe in 1999. In April, 2000 Invensys sold Westinghouse Brakes to Knorr-Bremse. Westinghouse Brake with 600 employees supplies metro and passenger rail brake systems primarily in the UK and Asian markets and freight brake systems to Australian and New Zealand. Knorr-Bremse, headquartered in Munich has 8,000 employees and sells rail braking systems. Invensys Rail's TBS platform has the designation TBS100. In January of 2001, Westinghouse Signals reported to TSD that its TBS100 has been operating reliably in revenue service in Madrid for since 1999 and that it is based upon an all new platform with open architecture and will provide the maximum resistance to obsolescence of the available platforms today. On July 2, 2001, Westinghouse Signals Ltd, changed its name to Westinghouse Rail Systems, Ltd
Please email additions/corrections/updates to Tom Sullivan
Suppliers change their names almost as often as their links -- which make it difficult for tsd.org to keep this table current. Please advise if you know of a better link or contacts. Information is believed correct as of November 2002. We normally make corrections/revisions/additions within one business day of being notified. Please let these firms know you found out about them from the tsd.org web site.
Train Control Affiliations
|Related Links / Comments
|What is IEEE-802.11?
longer a catalog item
Tunnel Planning Guide
|Model 3200 Mobil IP Router
different RF links
IP layer 3 network communications
|An advanced mobile Router (perhaps the only one of its type) Provides an IP connection iusing any of several available links from CDPD to IEEE 802.11
Iinterfaces IEEE-1473-L networks to industrial PC's using PC/104. Drivers for for Linux & Windows. Customers include Alstom, Siemens, DaimlerChrysler
IEEE 1473-L (and FTT-10 physical layer for trainline)
Ranging radio developed by Hughes for US military. Hughes sold technology to Raytheon. Harmon purchased technology for rail applications. GE purchased Harmon
IEEE 1473-L to IEEE-1473-T gateway
|Packet Tunnel Engine IEEE-1473-L related products
Tunneling Router tunnels IEEE-1473-L through T1, T3, WorldFIP, etc.
RS-422 and RS232
Owned by Union Pacific Railway. Formerly, AMCI.
|Rail Transit Consultants
IEEE-1473-L Network and Systems for rail Vehicles
|2400 MHz ISM Band
1.6 Mbps data rates!
|Uses advanced RAKE technology to combine multipath signals
IP & IEEE 1473-L for NYCT
Developing a DCS using a DS-SS radio tested at RATP. DCS expected to be similar to RailPath
|General Packet Radio System
DCS demonstrated during successful NYCT CBTC Culver trials in 1999. Now looking to license technology
ANSI EIA 709
Routers for IEEE-1473-L and rail transit applications
Please email additions/corrections or related links to Tom Sullivan
This link refers to new and interesting antenna technology. It may be great for subways where there is limited clearance:
Please email additions/corrections to Tom Sullivan
Please tell these firms you found them on tsd.org.
|CBTC / Other Relevant Expertise
|Communications; data networking IEEE/1473-L (LonWorks) routers
|RF and network systems for Air, Rail, and Transit systems
|Safety analysis of train control systems
|Booz Allen & Hamilton
|Advanced Train Control and Transportation Systems
|Railroad RF data communications. Publishes "Full Spectrum "
|RF data communications; embedded real-time systems design
|Grappone Technologies, Inc.
|Train Control, Broken Rail & Cost effective PLCs for signaling applications
|Group Alpha, Inc.
|IEEE 1473-L design & interfacing
|Train Control and Electronic Systems
|Parsons Transportation Group
|Lead consultant on NYCT's CBTC Canarsie Line Project
|PB Transit & Rail Systems
|Power, Signals, Communications and Transit Vehicles
|Lea + Elliott
|Automated People Movers & Train Control systems
|Rail Transit Consultants
|Vehicle systems design & integration. Experienced with IEEE-1473-L
|Transportation Systems Design
|Systems and network architecture, US standards, instruction/teaching
|LTK Engineering Services
|Vehicles and rail transit systems design
|20 yrs transit experience with advanced technology Train Control
|Rail Transit Vehicle Systems, Rail Transit Standards
|Power, Signals, CBTC & Train Control Systems
|Transit Performance Engineering
|Transit vehicle systems testing and integration
|Rail Transit Vehicle & Automated People Mover Standards
|Turner Engineering Company
|Engineering system design and safety analysis of rail transit vehicles
|West Bridge Consultants
|CBTC expertise & software development. See also: www.tsd.org/about
CWEG 809: Elements of Railway Signaling
This popular course is for those wishing a solid background in the fundamentals of traditional railroad signaling. Click on the above title for a course description.
CWEG-117: Communications Based Train Control
5-6 MAY 2003 Washington, DC US $890 1.4 CEUs and Certificate provided by GW
For questions or to register contact: Tom Sullivan at +1 (510) 531-8411 Past Review
Note: The next class will be held the 2 days prior to the 5th International CBTC Conference (See below)
CWEG117 provides both an overview and a detailed understanding of the latest Communications Based Train Control systems now being deployed worldwide. It is geared to the systems engineer, project manager, operations planner and others who desire to know more about this new technology. The course covers the ongoing challenges of industry migration to RF from inductive loops, emerging vehicle train control and vehicle network interface standards, traditional and new safety techniques and methodologies being established Worldwide. Also covered are costs Vs benefits, open Vs proprietary technology, intellectual property issues, and lessons-learned when installing CBTC on existing systems. Taught by Tom Sullivan, former Chief Signal Engineer for SF Muni and NYCT's former Director of New Technology Train Control, CWEG117 has been offered worldwide since 1998. Course material is updated yearly. A course outline is available by clicking on the above title.
On site courses are now available directly through Transportation Systems Design, Inc. with GW certification.
CWEG-118 Advanced Communications Based Train Control
This sequel to CWEG-117 (above) covers CBTC technology in greater technical detail.
Course prerequisite: BSEE or equivalent and CWEG 117 or consent of instructor.
This advanced course in Communications Based Train Control covers design techniques and issues to meet the challenges of building open interoperable train control systems for the 21st Century. Topics include specifying and designing systems compatible with new IEEE Rail Transit Vehicle Interface Standards (including IEEE 1473 & IEEE 1474) and other emerging interface specifications.
Additional topics include evolving circuit design techniques and tools, spread spectrum technology, software radio and bandwidth issues; RF "hacker protection" using message security & authentication; IP over RF, gateways and routers, new ANSI/EIA standards for tunneling IEEE-1473-L over Ethernet & IP, new mobile IP routers, and deterministic fault-tolerant fiber optic wayside communications. Discussions also include strengths and weaknesses of alternative CBTC/PTC techniques and technologies; vehicle Vs wayside centric architectures; RF Vs inductive loop communications and train control implementations issues using QNX, Windows, and embedded and open source operating systems such as Linux. Next generation Open Architecture Train Control (OATC), based upon fully exposed sub-system interfaces, using commercial-off-the-shelf systems compliant with ANSI/EIA 709 & IEEE 1473-L standards will also be discussed.
If you know of other CBTC or CBTC-related/relevant courses please contact Tom Sullivan so we can list them here.
Aonix makes software development tools used in safety-critical systems including rail. Alstom, CSEE, and Westinghouse UK use these tools. They are offering this free seminar which appears interesting:
Safety Critical Software Development Seminars
Signal Training Solutions
Blue Springs, MO
STS Provides Signal Training and Documentation services to the rail signal industry. Individual, Advanced, and Apprentice Programs are available. For more information contact Keith Holt at the above STS link.
Please advise Tom Sullivan if you know of a conference or relevant link that may be of interest to others.
Transportation Systems Design, Inc. - www.tsd.org
6543 Girvin Drive, Oakland, CA 94611 Voice: +1 (510) 531.8411 Fax: +1 (510) 531.7372