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The Carquinez Strait Bridges The Future of Northern California

The Carquinez Strait Bridges The Future of Northern California. By Jennifer Moore May 12, 2003. Bridge Characteristics. 8 Bridges link Bay Area Carquinez Bridge a major connector between Bay and farther north 110,000 average daily trips=second most used bridge

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The Carquinez Strait Bridges The Future of Northern California

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  1. The Carquinez Strait BridgesThe Future of Northern California By Jennifer Moore May 12, 2003

  2. Bridge Characteristics • 8 Bridges link Bay Area • Carquinez Bridge a major connector between Bay and farther north • 110,000 average daily trips=second most used bridge • Accounts for about 18% of toll revenue (27M) • Expected growth of 44% + 48,500 daily riders

  3. Project Overview • History: First steel truss bridge built in 1927, followed by a second steel truss bridge, 1958 • Problem: Oldest bridge has expanded life span, both bridges are not earthquake sound • Solution: Dismantle 1927 bridge, retrofit 1958 bridge, build a new twin-tower suspension bridge(Al Zampa Memorial), west of existing bridge, and build new Crockett Interchange

  4. Construction Pictures

  5. Bridge Benefits • Improves mobility across Northern California: -satisfy current seismic and safety standards -correct existing roadway deficiencies -improve traffic safety -maintain routes for local, regional, and interstate truck freight movement -support high occupancy vehicle (HOV) use -addition of public amenities (bike lanes and vista)

  6. Bridge Costs • Initial Estimates=$340M • Actual Costs= $480M -Regional Measure I (1988) • Cause a huge bottleneck during project span • Impact on local residents and environment -Loss of 20 homes, noise, water disturbances

  7. Project Funding • Regional Measure I (1988): voter-approved measure, run by Bay Area Toll Authority (BATA) to set a uniform toll of $1 on all state-owned Bay Area bridges, specifically for bridge and transit improvements • Collaboration between BATA, Metropolitan Transportation Commission (MTA), State (Caltrans), and local Crockett residences

  8. Project Funding, cont. • State Senate Bill 226: State transferred a portion of revenues and existing fund balances collected before June 30,1998. • Total transfer amount: $600 M • Total bonds issued: $400 M fixed and variable rate, more to be issued soon • TOTAL Available Funding > $1 Billion • Carquinez Bridges= approx 36% of funding -$144M of Bond (mature in 2018 and 2035)

  9. Cost/Benefit Analysis

  10. Conclusion • The Carquinez Bridges are not only essential for commuters and travelers, but also profitable if $2 toll remains • Improvements will help alleviate large traffic jams and make driving more safe • Final Question: What will the growing demands of the Bay Area have in store for the future of its bridges?

  11. References • “Toll Bridge Report to the California Legislature.” Metropolitan Transportation Commission http://www.mtc.ca.gov/bata/pdfs/ toll_bridge_report_2002.pdf • “Bay Area Toll Authority Sells $400M in Bonds for Bridge Work.” http://www.mtc.ca.gov/ whats_happening/press_releases/rel159.htm • “Carquinez Bridge.” http://www.dot.ca.gov/hq/ esc/tollbridge/Carquin/Carquinez.html

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