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A Desk Guide for Inventory Managers in the Transit Industry
Report Number: RRD-028
This digest was developed to provide a readily usable reference guide to assist transit managers and staff to better understand, evaluate, and manage inventory.  It summaries inventory control techniques appropriate to the transit industry, decision-making techniques, and benchmark references.  The final report, which describes the analyses and case studies performed during the course of the project, is available as TCRP Web Document 4 on the Internet at www2.nas.edu/trbcrp.
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A Guidebook for the Evaluation of Project Delivery Methods
Report Number: R-131
This report examines various project delivery methods for major transit capital projects.  The report also explores the impacts, advantages, and disadvantages of including operations and maintenance as a component of a contract for a project delivery method.
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Adaptive Diagnostic System Demonstration Project
Report Number: IDEA-02
The project developed a programmable PC-based tester with artificial intelligence capabilities for maintenance troubleshooting of electronic systems in transit equipment. The general system-level software and the neural network diagnostic subsystem originally proposed and designed had to be reassessed in view of the new advances in hardware and software and the results of system development and testing tasks. This led to several changes in the original work plan, which included using the preamp circuit rather than the XA-3 board as the focus of additional neural network testing and evaluation, changing the software to incorporate the Windows 95 operating system, and using and incorporating an improved test executive subsystem.
Print copy not available
Artificial Intelligence Technology for Transit Railcar Diagnostics
Artificial Intelligence Technology for Transit Railcar Diagnostics
Report Number: R-001
This report documents and presents the results of a study to determine the feasibility of applying Artificial Intelligence (AI) techniques to the diagnosis of transit railcars. The AI techniques investigated were expert systems, case-based reasoning, model-based reasoning, artificial neural networks, computer vision, fuzzy logic, and a procedural knowledge-based system. Site surveys were conducted at transit railcar maintenance facilities and at railcar subsystem suppliers. The site surveys gathered information about current and future diagnostic and maintenance practices, possible barriers to implementing advanced AI technology, and maintenance cost data.
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Automatic Wheel Inspection Station
Report Number: IDEA-03
An automated railroad wheel profile inspection system designed to measure wheel profiles at operating speeds using a laser scanning technology was developed and trial tested in a bench-scale demonstration. A Transit IDEA product report was published in October 1995. In Stage 1, preliminary specifications and hardware design for the system, including layout and component specifications, were completed. Several laser sensors have been tested on actual railroad wheel segments to determine the overall feasibility of the proposed approach. A bench-scale inspection station system was designed, fabricated, and tested in the laboratory. In Stage 2, in-house trial tests of the system in simulated railroad conditions were performed and operational durability and reliability of the system examined. The cost-effectiveness was assessed and an operating design of the system for routine application by transit operators was developed.
Print copy not available
Chemical and Biological Decontamination System for Rail Transit Facilities
Chemical and Biological Decontamination System for Rail Transit Facilities
Report Number: IDEA-45
This report is an investigation into the potential use and effectiveness of a remotely operated Electrostatically Charged Aerosol Decontamination (ECAD) process for decontaminating a rail transit station after a chemical or biological release.
Print copy not available
Cleaning Device for Electrified Third Rail Insulators
Cleaning Device for Electrified Third Rail Insulators
Report Number: IDEA-36
This report demonstrates a cost-effective device for cleaning electrified third rail insulators for rail rapid transit systems.
Print copy not available
Cleaning Device for Electrified Third Rail Insulators -- Phase 2
Cleaning Device for Electrified Third Rail Insulators -- Phase 2
Report Number: IDEA-47
The purpose of this project was to test and demonstrate an operational higher speed device for cleaning third rail insulators for rail rapid transit systems.  Dirt and grime can short circuit an insulator and cause arcing, burning, and smoke, which can cause the rail system to be shut down.  This is the second phase of the successfully completed IDEA Project 36.
Print copy not available
Demonstration of Artificial Intelligence Technology for Transit Railcar Diagnostics
Demonstration of Artificial Intelligence Technology for Transit Railcar Diagnostics
Report Number: R-044
This report will be of interest to railcar maintenance professionals concerned with improving railcar maintenance fault-diagnostic capabilities through the use of artificial intelligence (AI) technologies. The report documents the results of a demonstration of an AI-based program that acts as a diagnostic assistant for transit railcar propulsion systems. The diagnostic program uses a hybrid AI approach with both model-based reasoning and expert system rules. The AI tool was tested at the Washington Metropolitan Area Transit Authority (WMATA) on direct current chopper propulsion systems of the 3000 series railcars.  The system was determined to be easy to use and effective in diagnosing propulsion system faults.
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Derailment of Transit Vehicles in Special Trackwork
Report Number: RRD-015
This digest provides a summary of the findings from Transit Cooperative Research Program (TCRP) Project D-2, Derailment of Transit Vehicles in Special Trackwork, which was conducted by Zeta-Tech Associates, Inc. This research, completed in 1996, recommended procedures to reduce derailment occurrences. The following methods were found to provide a highly effective and economic means for reducing derailment potentials: use of pre-point guards; use of point protectors; adoption of comprehensive maintenance and inspection standards; use of lubrication; use of spring frogs; use of fully gauge plated switch- point areas; use of spiral switch points; and use of house-top point guards.
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