AltaViz –

GDOT’s Alternative Visualization Analysis Tool for the

Atlanta Managed Lane System Plan

February 25, 2011Atlanta Model User Group Meeting

Jennifer Zhan, AICPTom Hutchinson, AICP

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

Key Technical Elements

Traffic and revenue analysis

Conceptual design and cost estimation

Financial feasibility analysis

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)

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

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

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)

PARAMETERSBond RatesInternal Rate of ReturnFinancing TermDebt Service Coverage RatioSenior and Junior DebtDiscount Rate

PARAMETERSBond RatesInternal Rate of ReturnFinancing TermDebt Service Coverage RatioSenior and Junior DebtDiscount Rate

INPUTS

OUTPUTS

Net Present Value of Public Sector Outflow (GAP)

Capital Distribution

Revenue Stream

Capital Cost Estimates

Revenue Ramp-Up

Key Drivers and FactorsREVENUE DRIVERS

HOT2+, HOT3+, HOT4+ vs. ETL vs. METL vs. TOT

Maximum revenue vs. Maximum efficiency

Reversible vs. Bi-Directional

GP Lanes Remain vs. GP Lane Conversion

Laneage

Full Access vs. Optimized Access

REVENUE RISK FACTORS

Delayed vs. Base vs. Accelerated Growth

Willingness to Pay (Cars): Lower – Base- Higher

Willingness to Pay (Trucks): Lower – Base- Higher

Transit Frequency

Alternate/Competing Transportation investments

HOV Formation Rates

General Purpose Lane Speed

COST DRIVERS

System Termini

Reversible vs. Bi-Directional

At Grade vs. Elevated

Elevated: East/South side vs. West/North side vs. Median

Laneage

Barrier vs. Buffer

Full Reconstruction vs. Overlay

GP Lanes Remain vs. GP Lane Conversion

Full Access vs. Optimized Access

Design Exceptions

FINANCIAL PARAMETERS

Capital Structure Type

Financial Term

Opening Year for Traffic

Interest Rate for current interest bond

TIFIA Loan Interest Rate

Developer Required IRR

Facility Operation and Maintenance

Toll Collection Operation and Maintenance

> 1,000,000 data points

AltaViz – Alternative Visualization Analysis Tool

Consolidate a wealth of data

Efficient communication of results

Ability to perform side-by-side comparison of alternatives

GDOT’s Alternative Visualization Analysis Tool for the Atlanta Managed Lane System Plan

Questions?