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TCRP Report 130: Shared Use of Railroad Infrastructure with Noncompliant Public Transit Rail Vehicles: A Practitioner's Guide (2009)
Transit Cooperative Research Program (TCRP)

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Transportation Research Board. "Role of the Designated State Safety Organization." TCRP Report 130: Shared Use of Railroad Infrastructure with Noncompliant Public Transit Rail Vehicles: A Practitioner's Guide. Washington, DC: The National Academies Press, 2009.

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Page
23
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Page
23
Front Matter (R1-R12)
Research Objective (1-1)
Report Output (2-2)
Business Case (3-4)
Train Control Technology (5-5)
Grade Crossing Hazards (6-6)
Requirements for Concurrent Shared-Track Operations (7-7)
Practical Shortcuts (8-8)
Advancing the Shared-Track Concept (9-9)
Introduction (10-10)
Reader's Guide to the Final Report (11-11)
Scope of Work for Project A-27 (12-12)
Research Approach (13-13)
Characteristics of a Shared-Track Corridor (14-14)
Freight Operations Perspective (15-16)
Why Share Track? (17-17)
The Business Model (18-18)
Business Model Structure (19-19)
The Business Case (20-20)
Shared-Track - A Practical Business Case Structure (21-22)
Role of the Designated State Safety Organization (23-23)
Methods for Risk Analyses (24-24)
Equal Risks, Equivalent Safety (25-25)
Underpinning the Case for Shared-Track (26-26)
The Role of Command and Control Systems in Shared-Track (27-27)
1) Train Control System Functions (28-28)
2) Train Control System Design Parameters (29-29)
4) Train Control - Emerging Technology - PTC and CBTC (30-30)
System and Integration Testing - Vendor Role (31-31)
8) Issues Unique to Train Control for Shared-Track (32-32)
Auxiliary Safety Critical Systems (33-33)
9) Fail-Safe Train Separation (34-35)
2) Regulatory and Practical Requirements (36-37)
4) Functional Design of a Communications System (38-38)
2) Regulatory Mandates (39-39)
4) The Rulebook (40-40)
5) Rules and Procedures for Shared-Track (41-41)
Background (42-42)
2) Diesel Multiple Units and Electrical Multiple Units (43-43)
2) Crash Energy Management (CEM) (44-44)
3) Propulsion System (45-45)
5) Other Considerations (46-46)
Vehicles for Shared-Track Applications (47-47)
3) Standardization (48-48)
Applying Technology to Shared-Track Operations - A Brief Guide (49-50)
Shared-Track Operations - The North American Experience (51-51)
2) Former Private Freight Railroad Owner Becomes a Privileged Tenant (52-52)
4) Pressure to Commingle Is Heaviest on Lines with Higher Freight Densities* - A Review of Different Solutions (53-53)
6) Transit Operators Choosing to Avoid Commingling Sacrificed Service Quality and Efficiency (54-54)
Business Case Template (55-55)
Alternatives Analysis (56-56)
Reasons to Consider Noncompliant Equipment (57-57)
Service Characteristics to Justify the Choice of a Light Rail System (58-58)
Structures Considerations (59-59)
Cost and Ridership Analyses (60-60)
Cost Analysis for Signal System Alternatives (61-62)
System Capital Cost Assessment (63-63)
System Operating Cost Assessment (64-65)
Alternatives Evaluation (66-66)
Introduction (67-67)
Risk Analysis and Modeling Methodology (68-70)
Results and Risk Analysis Findings (71-72)
Safety Case Findings (73-73)
San Diego Trolley (74-74)
Achievable Incremental Steps (75-75)
Practical Shortcuts For Shared-Track (76-76)
Demonstration Project (77-77)
Application of Risk Analyses Methodology to the Demonstration Project (78-78)
Data Collection Plan (79-79)
San Diego Trolley, Inc. (80-80)
Barriers to Implementation (81-81)
Shared Track - The Potential Market (82-82)
Shared-Track Operation - An Evolving Concept (83-84)
Bibliography (85-86)
Appendix 1 - Abbreviations (87-87)
Appendix 2 - Glossary of Shared-Track Definitions (88-92)
Appendix 3 - TCRP A-27 Research Task Descriptions (93-97)
Appendix 4 - Relative Cost Comparison of Train Control Systems (98-99)
Appendix 5 - Sample Operating Rulebook Table of Contents (100-100)
Appendix 6 - Vehicle Cost Drivers (101-101)
Appendix 7 - Some Examples of Current Production LRV and MU Vehicle Types (102-105)
Appendix 8 - Shared-Track System Status (106-106)
Appendix 9 - Shared-Track Configuration and Operational Alternatives (107-109)
Abbreviations used without definitions in TRB publications (110-110)

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Shared-Track: Laying the Foundation--Policy and Strategy 23 The Safety Case To advance the business case, the safety stakeholders must be satisfied. The business case iden- tifies stakeholders with the most significant impacts on a project and then puts in place a win- win-win scenario. Simultaneously planners are guiding the resolution of various institutional, operational and technical issues. However, safety regulators can be the "deal breakers" for a planned project. Even if the freight operator, transit operator, and state and local interest groups and authorities are "on-board" and the purchase, liability, and track access agreements are com- pleted, progress is not guaranteed. The FRA must be convinced that the project fulfills its safety requirements. Any shared-track project will require an FRA Waiver Petition, and invite the scrutiny of both the FRA and State Safety Oversight Organization. FRA--Obtaining a Federal Waiver Typically, a project involving concurrent operation of light passenger rail cars and conventional railroad trains triggers the need for a federal waiver due to the presence of cars that do not conform to full federal crashworthiness standards for passenger-carrying equipment. A waiver petition details specific conditions that render federal requirements inapplicable and describes alternate means of providing equivalent safety. The information in a waiver application typically includes: · Description of the proposed shared-track operation on the general system of railroads; · Proposed light passenger rail car characteristics; · Proposed application of alternate technologies for signals, communications, train control, and other elements of the infrastructure; · Required deviation from federal requirements for vehicle design, train control system, oper- ating rules, practices, documentation, training, and maintenance procedures; and · Explanation why the deviations do not compromise the level of safety, and how equivalent safety is achieved. In pursuing a waiver, the agency examines each regulation and compares it to project design to ascertain the extent of compliance. The FRA will review plans and documents, inspect facili- ties, and interview technical, operating, and management staff as part of the approval process. All project elements that deviate from the current regulations must be addressed. If the FRA Office of Safety is satisfied, then a conditional waiver is granted, allowing operation of the pro- posed system. Approval is likely to be subject to specified terms and conditions, and is granted for a fixed term. There are two levels of federal involvement. The FRA Office of Safety headquarters is in Wash- ington, D.C., where the Safety Board convenes with respect to waiver petitions. The second is regional FRA offices, staffed by local experts and specialist who meet directly with project par- ticipants (designers, operators, agency managers), to review plans, and inspect facilities. Their reports are forwarded to the FRA Office of Safety and influence the Safety Board's review. Since the FRA plays such a dominant role in the project's implementation, initiators are encouraged to engage the agency early in the planning stage and keep local and headquarters rep- resentatives apprised of plans, developments or changes. It is advisable to maintain a dialogue between train control system designers and appropriate Federal officials from concept and design throughout testing and startup. Role of the Designated State Safety Organization Rail transit projects generally come under the jurisdiction of the state agency responsible for State Safety Oversight (SSO). The state is ultimately responsible for ensuring the safety of the rail