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12 Shared Use of Railroad Infrastructure with Noncompliant Public Transit Rail Vehicles: A Practitioner's Guide Chapter 2--Shared-Track: Laying the Foundation--Policy and Strategy Policy and strategy. This section explains the policy and strategic underpinnings of a shared-track operation. It discusses the broader institutional aspects including the busi- ness model, the outline of a business case and the safety case. It reviews the FRA Waiver process, the role of State Safety Oversight, and the contribution of Risk Analysis to the safety case. Chapter 3--Enabling Shared-Track: Technology, Command, and Control Technical elements. This is a straightforward summary of train control technology, commu- nications, Rules and Procedures and current and new vehicle designs, and how each con- tributes to a viable shared-track operation. It notes the influence of each on safety and the practical application and integration with both the passenger and freight operation. The influ- ence of technology on the safety case is described. Chapter 4--Shared-Track: A Handbook of Examples and Applications Practitioner's guide to shared-track. This section serves as the practical manual. It is an account of North American shared-track operations and progress to date. A business case template illustrating the use and interpretation of business case data (sample worksheets are included) follows next. The guide contains a risk analysis template and an explanation of how the results impact the business case and ultimately project viability. Incremental steps to move beyond "rigid temporal separation" are reported as evidence of evolutionary progress in shared-track operations. Finally, concrete guidelines are suggested to help project planners develop a shared-track operation with a freight railroad. Chapter 5--Shared Use: Progress and Evolution Future directions for the shared-track service concept. What realistic approaches can be employed to increase the interest and potential of shared-track systems? Candidates and appropriate conditions are recommended for a demonstration project. The advantages and disadvantages, and their effect on the potential market are reviewed. This segment points out barriers and impediments to broader application and acceptance of this mode of operations. Finally it suggests area or research and efforts likely to enhance the practical appeal of this operational concept. Bibliography Appendices 1) Abbreviations 2) Glossary 3) TCRP A-27 Research Task Descriptions 4) Relative Cost Comparison of Train Control Systems 5) Sample Operating Rulebook Table of Contents 6) Vehicle Cost Drivers 7) Some Examples of Current Vehicle Production LRV and MU Vehicle Types 8) Shared-Track System Status 9) Shared-Track Configuration and Operational Alternatives Research Effort Scope of Work for Project A-27 TCRP issued its Research Project Statement for Project A-27, "Shared Use of Railroad Infra- structure with Non-FRA-Compliant Public Transit Rail Vehicles" on March 29, 2005. Thirteen tasks broken into two phases (summarized previously and shown in the Appendix) constituted the scope of work and defined the research effort. The principal aim of the investigation, reiter- ated here, is taken from the Project Statement.