bristol travel model

Bristol MPO Travel Demand Model Update

Bristol Tennessee-Virginia Metropolitan Planning Organization

Date

Bristol Model Updatefor TNMUG MeetingNovember 10, 2011



Outline

IntroductionModel OverviewApplication of NHTS Add-on DataImprovements to Scenario ManagementInput for MOVES Air Quality Modeling



IntroductionFor 2035 LRTP development10 weeks to complete all TDOT review submittalsMajor updates: 2007 base year and 2035 horizon year Expand to 5 trip purposes Expand to 6 employment categories New QRFM based freight model New calibration and validation of model

components Enhanced usability of the model



TAZ Database



Highway Database



Bristol Model Structure



NHTS 2009 Data ApplicationData: NHTS 2009 add-on for Tennessee and Virginia

Applied to Bristol Model: Trip production model – Internal Trip rates Average vehicle occupancy by purpose



NHTS 2009 Add-on Samples - Tennessee



What to Use for Bristol Trip RatesOption 1 – Johnson City-Kingsport-Bristol TN-VA Metropolitan Statistical Area (MSA). Option 2 – All MSAs in TN and VA with < 500,000 population. Option 3 – Statewide data (TN and VA combined).

Factors considered in decision making: Sample size (in each cross-classification bin and

overall) Smooth progression of trip rates



Sample Size Compared



Smooth Progression IssuesOption 2:

Option 3:



Average Trip Rates Compared



Trip Rates Reasonableness Check and Adjustments



Average Auto Occupancy



Main Interface



Scenario Management Interface

Planning YearNetwork Alternative

Add new scenarioModify existing scenario



Long Range Plan Projects



Scenario Management Interface

Input folderInput files



Network Alternatives

Assign project to one or more network scenariosIncremental changes –Methodology and implementation



Network AlternativesProject table view



Input for MOVES Air Quality ModelingWhat the Bristol Model provides: Ramp Fractions Vehicle Type VMT Road Type VMT Fractions



Sample Emission Calculation and Post Processing



Contact InformationDavid Metzger – Bristol MPO

email: [email protected]: (423) 989-5522

Zhiyong Guo – Kimley-Hornemail: [email protected]: (901) 374-9109

bristol travel model

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