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AltaViz – GDOT’s Alternative Visualization Analysis Tool for the

AltaViz – GDOT’s Alternative Visualization Analysis Tool for the Atlanta Managed Lane System Plan. February 25, 2011 Atlanta Model User Group Meeting Jennifer Zhan, AICP Tom Hutchinson, AICP. GDOT’s Managed Lane System Plan.

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AltaViz – GDOT’s Alternative Visualization Analysis Tool for the

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  1. AltaViz – GDOT’s Alternative Visualization Analysis Tool for the Atlanta Managed Lane System Plan February 25, 2011 Atlanta Model User Group Meeting Jennifer Zhan, AICPTom Hutchinson, AICP

  2. GDOT’s Managed Lane System Plan • Respond to transportation needs which have outpaced traditional revenue sources • Provide a valuable and reliable mobility option, in spite of congestion • Lead and tackle policy and implementation issues • Unite managed lane investments into a comprehensive “system plan” framework

  3. Key Technical Elements • Traffic and revenue analysis • Conceptual design and cost estimation • Financial feasibility analysis

  4. Traffic and Revenue Analysis • Eligibility Policy (Cars vs. Trucks) • Occupancy Policy (HOT2+, HOT3+, HOT4+ vs. ETL) • Lane Method (Laneage, General Purpose Lane Conversion) • Bi-directional vs. Reversible • Full Access vs. Optimized Access • Financial Policy (Maximum revenue vs. Maximum efficiency)

  5. Revenue Risk Factors • Delayed vs. Base vs. Accelerated Growth • Willingness to Pay (Cars): Lower – Base- Higher • Willingness to Pay (Trucks): Lower – Base- Higher • Alternate/Competing Transportation investments • Transit Frequency • HOV Formation Rates • General Purpose Lane Speed

  6. Conceptual Design and Cost Estimation • Lane Method (Laneage, General Purpose Lane Conversion) • Bi-directional vs. Reversible • Full Access vs. Optimized Access • Barrier vs. Buffer • At Grade vs. Elevated (E/S side vs. W/N side vs. Median) • Full Reconstruction vs. Overlay • Design Exceptions

  7. Financial Feasibility Analysis • Inputs • Revenue streams • Capital costs for corridors and interchanges • Parameters • Capital Structure Type • Financial Term • Opening Year for Traffic • Interest Rate • Outputs • Capital distribution • Net Present Value of public sector outflows (GAP) INPUTS Revenue Stream Revenue Ramp-Up Capital Cost Estimates PARAMETERS Bond Rates Internal Rate of Return Financing Term Debt Service Coverage Ratio Senior and Junior Debt Discount Rate OUTPUTS Capital Distribution Net Present Value of Public Sector Outflow (GAP)

  8. Key Drivers and Factors > 1,000,000 data points

  9. AltaViz – Alternative Visualization Analysis Tool • Consolidate a wealth of data • Efficient communication of results • Ability to perform side-by-side comparison of alternatives

  10. GDOT’s Alternative Visualization Analysis Tool for the Atlanta Managed Lane System Plan Questions?

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