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?