BAY BRIDGE

MTC Bay Bridge Rail Feasibilty Study

July 2000

Submitted by:
Nelson/Nygaard Consulting Associates
Ove Arup & Partners
LTK Engineering Services
Simon Martin-Vegue Winkelstein Moris

TABLE OF CONTENTS

EXECUTIVE SUMMARY

• Rail Options
• Impacts of Rail Service on the Bay Bridge
• Costs
• Next Steps

CHAPTER 1. INTRODUCTION

• Bay Bridge History
• Study Parameters

CHAPTER 2. RAIL SERVICE OPTIONS

• Alternative A - Bay Bridge Light Rail
• Alternative B - BART Relief Line
• Alternative C - Basic Bridge Railroad Passenger Service
• Alternative D - Aggressive Bridge Railroad Passenger

CHAPTER 3. STRUCTURAL FEASIBILITY ANALYSIS

• West Span Structural Component Dead and Live Load
• Location of Rail Service on the West Spans
• Non-Structural Considerations
• West Span Structural Component Dead and Live Load
• The Impact of Rail Operations on the Proposed East Spans
• Yerba Buena Tunnel

CHAPTER 4. STRUCTURAL COSTS

CHAPTER 5. RAIL INFRASTRUCTURE AND ROLLING STOCK COSTS

• Transbay Light Rail Capital Costs
• BART Transbay Bridge Service
• Basic Bridge Railroad Passenger Service
• Aggressive Bridge Railroad Passenger Service

CHAPTER 6. CONCLUSIONS AND NEXT STEPS

APPENDIX A. DEFINITIONS AND NAMING CONVENTIONS

APPENDIX B. DATA/SPECIFICATIONS

TABLE OF FIGURES

• Figure ES-1 Rail System Weight and Clearance Data
• Figure ES-2 Structural Cost Summary
• Figure ES-3 Alternative Cost Summary
• Figure 1-1 Rail on the West Spans in 1959
• Figure 2-1 Portland Type 2 Low-Floor LRV
• Figure 2-2 Light Rail Service Alignment
• Figure 2-3 Transbay LRT Running Times
• Figure 2-4 BART C Car
• Figure 2-5 BART Transbay Bridge Service
• Figure 2-6 FRA Compliant Regional Rail
• Figure 2-7 FRA Compliant High Speed Rail
• Figure 2-8 Commuter and High Speed Rail Service Alignments
• Figure 2-9 BASIC Rail System Running Times
• Figure 2-10 "Aggressive" Rail System Running Times
• Figure 3-1 Rail System Weight and Clearance Data
• Figure 3-2 Retrofitted West Span Demand to Capacity Ratios
• Figure 3-3 Below Deck Option
• Figure 3-4 Simulation of Below Deck Option
• Figure 3-5 Lower Side By Side Operation
• Figure 3-6 Simulation of Lower Side by Side Option
• Figure 3-7 Upper Side by Side Option
• Figure 3-8 Simulation of Upper Side By Side Option
• Figure 3-9 Non-Structural Considerations - Rail on West Span
• Figure 3-10 Load Impacts of Rail on the West Spans
• Figure 3-11 Load Impact of Rail Systems on Bridge Spans
• Figure 3-12 Demand/Capacity Ratios for West Span Members with Rail and Added Deck Area
• Figure 3-13 Weight Reduction Potential of Light Weight Roadway Decks
• Figure 3-14 Weight Impacts of Rail Options Assuming Light Weight Decking Material
• Figure 3-15 Impact of Lightweight Deck Material on Main Cable Demand
• Figure 3-16 Impact of Lightweight Deck Material on Suspender Cable Demand
• Figure 3-17 Current Proposed East Span Typical Section - 5 Lane Design
• Figure 3-18 Current Proposed East Span Typical Section - 4 Lane Design with Light Rail
• Figure 3-19 Rail Alignment - East Span's Exterior Rail to Below the Yerba Buena Island Tunnel
• Figure 3-20 Rail Alignment - East Span's Exterior Rail to Each Side of the Yerba Buena Island Tunnel
• Figure 3-21 East Spans Section
• Figure 4-1 Structural Cost Summary
• Figure 4-2 Structural Cost Estimate
• Figure 5-1 Rail Infrastructure and Rolling Stock Costs
• Figure 5-2 Alternative A - Bay Bridge Light Rail: Estimated Link Miles & Running Times
• Figure 5-3 Pro-Forma Timetable for Alternative A, Bay Bridge - Eastbay Light Rail System
• Figure 5-4 Alternative A - Light Rail Transit: Capital Cost Estimate - Unit Costs
• Figure 5-5 Transbay Service Investment Cost Summary
• Figure 5-6 Rolling Stock Summary
• Figure A-1 Partial Three-Dimensional Model - Bay Bridge West Spans
• Figure A-2 West Spans Partial Elevation
• Figure A-3 Stiffening Truss - Typical Section - Suspension Spans
• Figure A-4 Stiffening Truss - Elevation