InfraConsultPresToEx pertPanel 010807

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Mississippi River Bridge An Analysis of Alternatives: 

Mississippi River Bridge An Analysis of Alternatives Expert Panel Review Sharon Greene & Associates

Agenda: 

Agenda Purpose and Need for New Bridge Existing Conditions Definition of Alternatives Comparison of Alternatives

Purpose of Project: 

Purpose of Project “The purpose of the proposed action is to relieve increasingly severe traffic congestion and reduce traffic crashes on downtown St. Louis-area Mississippi River crossings, especially on the Poplar Street Bridge (I-55/70/64), thereby avoiding economic stagnation at the core of the region.” Source: Mississippi River Crossing: Relocated I-70 and I-64 Connector, Final Environmental Impact Statement, March 2001.

Need for Project: 

Need for Project Improve travel capacity and travel efficiency Improve system linkages and community access Reduce traffic crashes Reduce travel times Avoid economic stagnation Source: Mississippi River Crossing: Relocated I-70 and I-64 Connector, Final Environmental Impact Statement, March 2001.

Existing Downtown Crossings: 

Existing Downtown Crossings McKinley Bridge ML King Bridge Eads Bridge Poplar Street Bridge

Existing Conditions: Daily Crossings: 

Existing Conditions: Daily Crossings Source: Mississippi River Crossings: Average Daily Traffic History, Illinois Department of Transportation.

Existing Conditions: Downtown AM Peak Westbound Destinations: 

Existing Conditions: Downtown AM Peak Westbound Destinations I-64 CBD I-70 I-55 10,964 Total Peak Hour Trips 3,847 (35%) 1,478 (13%) 3,877 (35%) Source: Mississippi River Crossings: Overview of Travel Patterns, East-West Council of Governments, September 2005. 1,762 (16%) N Mississippi River

Existing Conditions: Poplar AM Peak Westbound Destinations: 

Existing Conditions: Poplar AM Peak Westbound Destinations I-64 CBD I-70 I-55 6,767 Total Peak Hour Trips 3,847 (57%) 1,478 (22%) 979 (14%) Source: Mississippi River Crossings: Overview of Travel Patterns, East-West Council of Governments, September 2005. 463 (7%) N Mississippi River Poplar

Existing Conditions: All Downtown Crossings by Vehicle Type AM Peak, Westbound Destinations: 

Existing Conditions: All Downtown Crossings by Vehicle Type AM Peak, Westbound Destinations Source: Special Traffic Counts, East-West Council of Governments, December 2006.

Existing Conditions: Poplar Street Crossings by Vehicle Type AM Peak, Westbound Destinations: 

Existing Conditions: Poplar Street Crossings by Vehicle Type AM Peak, Westbound Destinations Source: Mississippi River Crossings: Overview of Travel Patterns, East-West Council of Governments, September 2005.

Existing Conditions: Poplar Street Crossings by Vehicle Type: Off-Peak Only West bound Destinations: 

Existing Conditions: Poplar Street Crossings by Vehicle Type: Off-Peak Only West bound Destinations Source: Mississippi River Crossings: Overview of Travel Patterns, East-West Council of Governments, September 2005.

Alternatives Under Consideration: 

Alternatives Under Consideration McKinley Bridge ML King Bridge Eads Bridge Poplar Street Bridge Proposed MRB Proposed Coupler Bridge Proposed IL-3 Proposed I-64

MRB: No Connections: 

MRB: No Connections Landside Improvements: None Capital Cost Estimate: $999.2M (YOE) Proposed Schedule: 2009-2014 NEPA Status: ROD proposed 2007 Potential Committed Funding: SAFETEA-LU Earmarks: $239M Additional IDOT Funding: $210M Tolling Considered: Yes Proposed MRB

MRB: With I-64 Connector: 

MRB: With I-64 Connector Landside Improvements: I-64 Connection Capital Cost Estimate: $1,561.5M (YOE) Proposed Schedule: 2009-2014 NEPA Status: ROD proposed 2007 Potential Committed Funding: SAFETEA-LU Earmarks: $239M Additional IDOT Funding: $210M Tolling Considered: Yes Proposed MRB Proposed I-64

MRB: With I-64 and IL-3 Connections: 

MRB: With I-64 and IL-3 Connections Landside Improvements: I-64 Connection and IL-3 Connection Capital Cost Estimate: $1,762.5M (YOE) Proposed Schedule: 2009-2014 NEPA Status: ROD proposed 2007 Potential Committed Funding: SAFETEA-LU Earmarks: $239M Additional IDOT Funding: $210M Tolling Considered: Yes Proposed MRB Proposed I-64 Proposed IL-3

MLK Coupler Bridge: 

MLK Coupler Bridge Landside Improvements: None Capital Cost Estimate: $545.9M (YOE) Proposed Schedule: 2012-2014 NEPA Status: Not Analyzed Potential Committed Funding: SAFETEA-LU Earmarks: $239M Additional IDOT Funding: $210M Tolling Considered: No Proposed Coupler Bridge

Comparison of Alternatives: 

Comparison of Alternatives Congestion Reduction Network Connectivity Travel Time Savings Regional Economic Development Impacts Potential for Revenue Generation

Congestion Reduction: 2020 Traffic Volume Comparison: 

Congestion Reduction: 2020 Traffic Volume Comparison 214,358 371,705 230,135 381,755 391,378 246,400 391,828 242,625 392,079 246,248 391,232 234,238 391,346 232,368 391,254 233,609 391,220 230,861 Source: East-West Gateway Council of Government Travel Demand Model Run

Congestion Reduction: 2020 Traffic Volume Comparison: 

Congestion Reduction: 2020 Traffic Volume Comparison Source: East-West Gateway Council of Government Travel Demand Model Run

Congestion Reduction: 2020 AM Westbound Volume to Capacity (V/C) Ratio: 

Congestion Reduction: 2020 AM Westbound Volume to Capacity (V/C) Ratio Source: East-West Gateway Council of Government Travel Demand Model Run

Congestion Reduction: 2020 PM Eastbound Volume to Capacity (V/C) Ratio: 

Congestion Reduction: 2020 PM Eastbound Volume to Capacity (V/C) Ratio Source: East-West Gateway Council of Government Travel Demand Model Run

Slide22: 

Travel Patterns MRB: All Connections

Internal/External Trips Analysis: New MRB: 

Internal/External Trips Analysis: New MRB Source: East-West Gateway Council of Government Travel Demand Model Run

Internal/External Trips Analysis: Poplar Street Bridge: 

Internal/External Trips Analysis: Poplar Street Bridge Source: East-West Gateway Council of Government Travel Demand Model Run

Internal/External Trips Analysis: Change on Poplar Street Bridge: 

Internal/External Trips Analysis: Change on Poplar Street Bridge Source: East-West Gateway Council of Government Travel Demand Model Run

Annual Travel Time Savings: All Bridges: 

Annual Travel Time Savings: All Bridges Source: East-West Gateway Council of Government Travel Demand Model Run

Average Travel Time for AM Westbound Trips: Poplar, New MRB, and MLK Bridges: 

Average Travel Time for AM Westbound Trips: Poplar, New MRB, and MLK Bridges Source: East-West Gateway Council of Government Travel Demand Model Run

Average Travel Time Between Key Origins and Destinations: 

Average Travel Time Between Key Origins and Destinations

Average Travel Time Savings: 

Average Travel Time Savings Source: East-West Gateway Council of Government Travel Demand Model Run

Average Travel Time Savings: 

Average Travel Time Savings Source: East-West Gateway Council of Government Travel Demand Model Run

Average Travel Time Savings: 

Average Travel Time Savings Source: East-West Gateway Council of Government Travel Demand Model Run

Average Travel Time Savings: 

Average Travel Time Savings Source: East-West Gateway Council of Government Travel Demand Model Run

Regional Economic Development Impacts: 

Regional Economic Development Impacts Little definitive data is available Business community forecasts show positive impacts in qualitative terms Changes in the rate of growth and traffic within the region over the last 10 years raises issues related to economic growth: Will a new bridge spur new net growth, and hence contribute positively to the region’s economy? Will the absence of a new bridge hinder potential growth with an inherent negative impacts on the region’s economy?

Potential Toll Revenue Generation: 

Potential Toll Revenue Generation Toll Diversion Rates Assumptions Potential Revenue Generation Potential Funding Scenario

Estimated Toll Diversion Rates: Travel Demand Model Results : 

Estimated Toll Diversion Rates: Travel Demand Model Results Source: East-West Gateway Council of Government Travel Demand Model Run

Potential Toll Bond Revenue Generation: Assumptions: 

Potential Toll Bond Revenue Generation: Assumptions Weekend traffic levels: 0.5 * weekday levels Annualization Factors Weekday: 250 Weekend: 115 Toll Rate Scenarios: $1 Auto / $3 Truck $2 Auto / $4 Truck Annual O&M Cost:10% of Annual Toll Revenue Debt Coverage Level: 1.4 Bond Amortization: 30 years @ 5.75%

Potential Toll Bond Revenue Generation Estimate: Travel Demand Model Results (in millions): 

Potential Toll Bond Revenue Generation Estimate: Travel Demand Model Results (in millions)

Potential Funding Scenarios: Travel Demand Model Results: 

Potential Funding Scenarios: Travel Demand Model Results

Potential Funding Scenarios: Travel Demand Model Results: 

Potential Funding Scenarios: Travel Demand Model Results

Potential Toll Bond Revenue Generation: Additional Consultant Assumption: 

Potential Toll Bond Revenue Generation: Additional Consultant Assumption $1 Auto / $3 Truck Diversion Rate = 50% $2 Auto / $4 Truck Diversion Rate = 70%

Potential Toll Bond Revenue Generation Estimate: Consultant Assumption (in millions): 

Potential Toll Bond Revenue Generation Estimate: Consultant Assumption (in millions)

Potential Funding Scenarios: Consultant Assumptions: 

Potential Funding Scenarios: Consultant Assumptions

Potential Funding Scenarios: Consultant Assumptions: 

Potential Funding Scenarios: Consultant Assumptions

Questions?: 

Questions?

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