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May 2001
Amtrak Advanced Civil Speed Enforcement PTC
System Status Report Jim Hoelscher
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ACSES
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ACSES PTC Overview

• Advanced Civil Speed Enforcement System
• Northeast Corridor
• 240 Route Mi./ 506 Track Mi.
• Plan 400 route miles/ 1150 Track miles
• 48 Interlockings
• Plan 100 interlockings

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ACSES PTC Overview

• 460 Locomotives Commuter Trains
• AEM 7, F40PH2, GP40, GP9, U23B, B23-7, GP 38,
  GE Super 7, MP 15, F40
• Kawasaki, MBB, Bombardier Control Coaches
• High Speed Locomotives
• ACELA High Speed Tilt Trains

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ACSES PTC Overview

• Overlays the Cab Signal System
• Independent of Cab Signal
• Cab Signal Provides Speed Limit for Safe Train
  Separation and Signal Speed Enforcement
• ACSES Provides Civil (Track) Speed Limit and
  Positive Train Stop at Interlocking Home signals

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Trainborne Equipment
Radio Antenna
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ADU
Signal Aspect
Cab Signal Speed Limit
Enforcement Indicator
Civil Speed Limit
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Transponders
Transponder data contained in Programmable plug

• Operates to 310 MPH
• Passive - No wiring

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ACSES PTC Overview

• Transponder Operation
• On board antenna transmits 27.115 MHz signal
• Wayside transponder receives signal Uses energy
  in received signal to power transmitter
• Transponder transmits 4.5 MHz data signal
• Message contains 255 bits - 180 bits data, 72
  bits CRC 3 fill bits

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ACSES PTC Overview

• Transponder Data
• Location of Transponder (RR, Line, MP, Track,)
• Distance to Next Transponder
• Current Civil Speed for 5 Train Types
• Distance to Speed Restriction
• Speed Restriction Speed Limit For 5 Train Types
• Length of Speed Restriction

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ACSES PTC Overview

• Transponder Data (Cont.)
• Distance to Home Signal
• Grade
• Local ATCS Radio Address and Frequency
• Phase/Power Break Start/Stop Locations

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ACSES PTC Overview

• ATCS 200 Radio Network Data
• Interlocking Home Signal Status
• Interlocking Exit Track
• Start/Stop Location of Temporary Speed
  Restriction
• Temporary Speed Limits for Passenger and Freight

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ACSES Speed Restrictions
Curves, Bridges, etc.
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ACSES Positive Train Stop

• Transponder sets stop point at Home signal
• PTS enforced if Cab signal not better than
  restricting
• Released by radio if the Home Signal not at Stop
• Train civil speed limit through the interlocking
  is sent by radio

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ACSES PTC

• Phase I
• Civil Speed Enforcement
• Home Signal Stop Enforcement (PTS)
• Phase II
• Radio Release PTS
• Temporary Speed Restriction - On Board Enforcement

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ACSES PTC Phase I Status
Boston
R. I. / Mass. 190.8
Cove 228.0
Conn./ R.I. 141.1
Junction 214.0
New Haven
High Street 139.0
Nan 113.3
In Service Dates May, 2001 May, 2001 December 10,
2000 May, 2001
Mill River 73.8
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ACSES PTC Phase I Status
NJ/NYC 1.2
Pa./N.J. 57.7
Maryland/Delaware 41.4
Ham 55.5
Holmes 77.2
County 32.8
Delaware/Pa. 18.2
Morris 58.3
Washington, D.C.
Ragan 29.7
Maryland
Prince 57.3
131.6
Grove 112.4
In Service Dates June 30, 2001 Not
Scheduled March 26, 2001
Landover 128.8
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ACSES PTC Phase I Status

• On-board equipment installed ready for (or in)
  service (241 Units)
• 77 Amtrak
• 74 MBTA
• 24 CSX
• 16 P W
• 14 CDOT
• 12 High Speed Locomotives
• 24 Acela

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ACSES PTC Implementation

• Standard Interfaces designed to allow application
  of ACSES on different locomotives and control
  cars
• Cab Signals Systems
• Air Brake Interface
• Locomotive Controls

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ACSES PTC Phase I Operation

• Infrastructure Data Must be Accurate
• Curve Speeds Locations
• Chaining data
• Operation Problems
• No problems with transponders
• Operators learning curve
• Brake Curves conservative
• No Time to Penalty or Brake curve information
  given to operator

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ACSES PTC Phase I Operation

• System Modifications
• Expand wheel size calibration range
• Redefine actions requiring operator
  acknowledgement
• Modify Tilt Enable/Disable
• Energize ACSES magnet valve when cutout

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ACSES PTC Phase II
To CETC
2oo3 Safety server TSR server
Network server - 1
Network server - 2
HUB 1
HUB 2
NMS
WCC / FPD 1
WCC / FPD 2
1 of 10
1 of 10
Multiplexer
Multiplexer
Multiplexer
Multiplexer
1 of 4/5
1 of 4/5
DSU
DSU
DSU
DSU
A/B switch
Modem DSP 9600
BCP
Modem
Modem
Encoder
Encoder
Train
MCP
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ACSES PTC Phase II Operation

• Temporary speed restrictions (TSR) by CETC
  operators
• Current process retained
• Paper copies and/or voice radio updates
• TSRs transmitted to trains in terms of radio
  coverage areas
• Train receives all TSRs in direction of travel
  for current plus next 2 radio coverage areas
• TSRs enforced by onboard equipment the same as
  permanent speed restrictions received from
  transponders

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ACSES PTC Phase II Status

• BCPs delivered
• Antenna sites being determined
• Encoders delivered
• Site specific logic design started
• TSR Input Process Interface with CETC operators
  defined
• Office servers and communications network
  designed
• OBC requirements defined

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ACSES PTC Phase II Schedule

• Phased implementation
• PTS Radio release
• TSR enforcement
• To be completed 2002

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PTC Interoperability

• NJT ASES
• Equipment
• Compatible transponders
• Standard antenna/transponder interface
• System
• Transponder messages defined by Amtrak/NJT

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Conclusion

• In service
• 75 Mile section - December 10, 2000
• 22 Mile section - March 26, 2001
• Provides functionality desired
• Operators are learning the conservative nature of
  the brake curves
• Input from operators is being used to modify
  system operation
• ACSES Cab signal provides civil speed, train
  separation and signal speed enforcement

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