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|What's Happening||Products & Services|
CBTC industry news and views
Suppliers & CBTC-related products
Who just bought who
|Positive Train Control
Railroad CBTC projects
Suppliers and products
US & Worldwide
US & International
| RSSI Buyers
CBTC & Traditional Railway Signaling
CBTC & Related papers
|Safety and Software|
Train Network Protocol
Absolute Position Determination Notes
Kevin Fitzgerald RF
(proprietary but based upon LZB & 56 kHz carrier
Industry Standard Tag
Loop Crossover Loop Crossover
Alstom URBALIS 300
(New technical papers coming soon)
USA: Northeast Corridor ACES
(Select "Rail Control" then "Mass Transit Solutions"
Safetran S3 Link
RF-CBTC to go in revenue service - SFO
1 of 3 CBTC contracts for RATP
CBTC & AATC:
Radio Ranging using EPLRS
GPS & Tacho
Nippon Signal Makoto
CBTC train line communications subsystem systems for GE Safetran Systems TBS100
Focus is primarily on US Railroads. Siemens
+33 1 49 65 74 50
(UK's SW Desiro train sets)
NYCT R-143 (Proprietary)
(Air Gap proprietary)
NYCT RF-ID Tag
Optical (Meteor RF):
Original successful NYCT CBTC trials on Culver Line used
+33 (0) 220.127.116.11.04
1 of 3 CBTC contracts for RATP
(Note 1) Denny
IEEE-1473-L Siemens JV partner on NYCT Westinghouse
"A further software upgrade allows migration to moving block."
PTC - IDOT
(Comms subcontractor to Lockheed Martin)
IEEE 802.11 (open)
ATCS 200 (open)
Mobile Satellite Multiple UHF Data Radios
Information believed accurate as of March 2004. Please email corrections, updates, or comments to: Tom Sullivan.
Please let these firms know you learned about them from TSD.ORG
RF=Radio Frequency; IL=Inductive Loop; RF-ID=Passive Radio Frequency Identification Transponder; OP: Optical
DCS=Data Communications System (CBTC communications system backbone);
Proprietary = Typically, only one source. Prices unknown and/or not published. Licensing fees undisclosed.
Open = Technology and interfaces are open and/or based upon consensus standards such as ANSI/EIA IEEE, etc.
COTS = Commercial Off The Shelf. Published prices (Price is known and the same for everyone.)
Signal Supplier Score Card
Alcatel Canada's (Formerly ITT SEL) flagship CBTC product Seltrac evolved from LZB which means continuous train control. Originally, 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 now designated LZB 80.
Much like Siemens and Alcatel which jointly developed LZB, Alstom and BTR (British Westinghouse) developed a common Triple Modular Redundant Solid State Interlocking (SSI) architecture under the design guidance of British Rail. The original SSI accepts hot-swappable modules and has been a standard for RailTrack in the UK for years. Older TFMs (Trackside Functional Modules) based upon the original 1 MHz CPU clock are interchangeable between suppliers -- good news for buyers who desire not to be tethered to a single supplier for spares. Unfortunately, newer 2 MHz units are incompatible and not interchangeable.
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 (US&S) 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. As of mid-1995 Ansaldo does not appear to have a CBTC-based product.
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 called Atlas in the early 1990's, Alstom's latest CBTC technology system is called URBALIS. URBALIS is comprised of MASTRIA, Automatic Train Control subsystem (trackside and on-board parts) and SMARTLOCK the interlocking component.
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 (later purchased by Siemens), and (2) Jeumont Schneider (later purchased by GEC Alsthom and 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 Algol source code to Ada which has since formed the 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) 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, discussion and updates on this subject in its discussion forum.
Bombardier: 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. 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 May of 2004.Bombardier's driverless CBTC product formerly known as Flexiblok was renamed CITYFLO* 650. For operator attended systems the product is CITYFLO* 450.
GE: In 1999, GE Harris (a 50-50 partnership) purchased Rutherford's Rail Safety Engineering (US) and also Syseca but in 2002 GE sold its Syseca group to ARINC. In September of 2000 GE Harris purchased Harmon and was 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 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 that exceed US $500,000,000. Today, GE's EPLRS radio ranging network forms the heart of its Advanced Automatic Train Control System CBTC product now being developed for SF BART. We understand that GE's advanced EPLRS radio network is also sold al a carte.
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 also owns Triconex a manufacturer of non-stop 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 Transmission Based Signalling platform is called TBS100. In January of 2001, Westinghouse Signals reported its TBS100 has been operating reliably in revenue service in Madrid since 1999. Westinghouse states 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
For more information about specific CBTC Projects click here.
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 July 2004. We normally make corrections/revisions/additions within 1-3 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|
|Alvarion||IEEE 802.11||802.11||Alcatel||What is IEEE-802.11?|
Developed: circa 1995
Obsolete: circa 2002
In service at SFO and soon SEPTA
|Cisco Systems||Mark Bresnicker||Model 3200
Mobil IP Router
|Supports multiple RF paths using IP network communications||
Versatile and advanced mobile router provides an IP connection using any available RF link from CDPD to IEEE 802.11
|Thomas Schneider||EasyLon PC/104||
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 powerline technology for physical layer for trainline
Radio Ranging DCS 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.
|ATCS 200||900 MHz
RS-422 and RS232
Owned by Union Pacific Railway. Formerly, AMCI.
|Rail Transit Consultants||
IEEE-1473-L Network and Systems for rail Vehicles
CITYFLO 450 and 650
See Note 2
||Bruno Guillaumin||REKA120||2400 MHz ISM Band
1.6 Mbps data rates!
|Uses advanced RAKE technology to combine multipath signals|
|Siemens Transportation Systems||Jon Bader||2.4 GHz
IP & IEEE 1473-L for NYCT
Developing a DCS using a DS-SS radio tested at RATP that is expected to be similar to RailPath
|ETCS||General Packet Radio System|
DCS demonstrated during successful NYCT CBTC Culver trials in 1999. Now looking to license technology to others
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.
|Contact||CBTC / Other Relevant Expertise|
|ACEx||Ray Louis||Communications; data networking IEEE/1473-L (LonWorks) routers|
|ARINC||Audrey Strathmeyer||RF and network systems for Air, Rail, and Transit systems|
|Battelle||Jon Luedeke||Safety analysis of train control systems|
|ARUP||Naor Wallach||Architectural Engineering Firm - 45% in Rail Market inc. Train Control|
|Booz Allen & Hamilton||Mick McDonald||Advanced Train Control and Transportation Systems|
|Communication Architecture||Ron Lindsey||Railroad RF data communications. Publishes "Full Spectrum "|
|Critical Link||John Fayos||RF data communications; embedded real-time systems design|
|HCRQ System Safety||Emmett McCain||Safety-critical systems, software safety|
|Grappone Technologies, Inc.||Victor Grappone||Train Control and Broken Rail Detection systems|
|Group Alpha, Inc.||IEEE 1473-L design & interfacing|
|Innovation||Ron Tolmei||Train Control and Electronic Systems|
|Parsons Transportation Group||Alan Rumsey||Lead consultant on NYCT's CBTC Canarsie Line Project|
|PB Transit & Rail Systems||Harvey Glickenstein||Power, Signals, Communications and Transit Vehicles|
|Lea + Elliott||Wade Scott||Automated People Movers & Train Control systems|
|Rail Transit Consultants||Rick Lerew||Vehicle systems design & integration. Experienced with IEEE-1473-L|
|Transportation Systems Design||Tom Sullivan||Systems and network architecture, US standards, instruction/teaching|
|LTK Engineering Services||Jim Dietz||Vehicles and rail transit systems design|
|Semaly||Herve Cugnet||20 yrs transit experience with advanced technology Train Control|
|Signal Innovations||John Cipollone||Innovative signaling and train control technology for railroads transit.|
|STV, Inc.||Tom Spearing||Rail Transit Vehicle Systems, Rail Transit Standards|
|Systra Consulting||Power, Signals, CBTC & Train Control Systems|
|TJMPE||Tom McGean||Automated People Movers and Rail Standards|
|Turner Engineering Company||David Turner||Engineering system design and safety analysis of rail transit vehicles|
|West Bridge Consultants||John Selke||CBTC expertise & software development. See also: www.tsd.org/about|
Please email additions/corrections to Tom Sullivan. If you contact any of the above individuals, please tell them you found them via the TSD.ORG website.
May 3-4, 2005, Washington, DC
Held every two years this is the biggest CBTC conference in the world. Don't miss it!
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
Revised: 01 Apr 2005