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