Preface

1.0  Introduction
     1.1  Purpose
     1.2  Goal
     1.3  Project History
     1.4  Data Files
     1.5  Definitions of Highway-Rail Intersections

2.0  Highway-Rail Crossing Inventory Number
     2.1  Background
     2.2  Uniqueness and Calculation
     2.3  Assignment of Numbers
     2.4  Number Boards
          2.4.1  Specifications
          2.4.2  Installation and Display
          2.4.3  Maintenance

3.0  U.S. DOT-AAR Crossing Inventory Form Recording Instructions
     3.1  Recording Instructions
     3.2  U.S. DOT-AAR Crossing Inventory Form Heading
     3.3  Part I Location and Classification of All Crossings
     3.4  Part II Detailed Information for Public Vehicular at Grade Crossing
     3.5  Part III Physical Data
     3.6  Part IV Highway Department Information

4.0  Inventory Update Procedures
     4.1  General
     4.2  Inventory Form
     4.3  Data Items
     4.4  Railroad and State Agency Update Submission Procedures
     4.5  Summary of Completed Inventory Form Handling Procedures
     4.6  One-party Submissions
     4.7  Inventory Computer Printout Mark-up
     4.8  Overview of Update Processing at FRA

5.0  Mass Updating
     5.1  Fill-in-the-Blanks Computer Printout
     5.1.1  Train Counts and Train Speeds Updating
     5.1.2  Signs, Markings, and Part IV State Highway Information
     5.1.3  Other Examples
     5.2  Mass Update Requirements
     5.3  Special Procedures for Certain Items
     5.4  Feedback of Updated Records from the National File
     5.5  Continuous Feed Update Forms
     5.6  Common Errors in Updating
     5.7  Handling of Errors on Updates

6.0  Magnetic Tape

7.0  GX Data Management System
     7.1  Installation Program
     7.2  Browse Facility
     7.3  Update Facility
     7.4  Report Facility
     7.5  Data Extraction Facility
     7.6  Backup and Restore Facility
     7.7  Documentation

8.0 S ystem Outputs

9.0  DOT Highway-Rail Crossing Accident Prediction and Resource Allocation Procedure
     9.1  Background
     9.2  DOT Accident Prediction Formula
     9.3  Resource Allocation Model
     9.4  Data Provided to States and Railroads
     9.5  Performance Compared to Other Models

10.0  Additional Information and References
     10.1  Highway-Rail Grade Crossing Handbook
     10.2  Worldwide Geographic Location Codes
     10.3  Federal-Aid Policy Guide

Appendix A - State Contacts
Appendix B - Computer Printout Format Samples
Appendix C - FRA Magnetic Tape Format
Appendix D - GX Data File Structure
Appendix E - Railroad Codes