Transportation leadership you can trust. presented to Southeast Florida FSUTMS Users Group presented by Krishnan Viswanathan and Capton Siluvairajan Cambridge.

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Presentation transcript:

Transportation leadership you can trust. presented to Southeast Florida FSUTMS Users Group presented by Krishnan Viswanathan and Capton Siluvairajan Cambridge Systematics, Inc. February 8, 2008 Development of Journey to Work Flows Data and Visualization Tool

1 Outline CTPP Description Project Objective Data Development Dynamic Visualization of Journey to Work (JTW) Flows Summary and Future Work

2 CTPP Description The Census Transportation Planning Products (CTPP) provides tabulations of households, persons and workers CTPP is a set of special tabulations from the decennial census designed for transportation planners The data are tabulated from answers to the Census 2000 long form questionnaire, mailed to one in six U.S. households

3 CTPP Description Evaluate existing conditions Develop or update travel demand models Analyze demographic and travel trends

4 Project Objective CTPP Part 3 flow data good source for validating HBW trip tables Geographic coverage of Part 3 data County Census Tracts TAZs (State and MPOs) Compile TAZ-to-TAZ Journey-to-Work (JTW) tabulation from Census 2000, using the latest regional TAZ structures for Brevard, Indian River, St. Lucie, Martin, Palm Beach, Broward, and Miami-Dade Counties.

5 Data Development Model Area

6 Data Development Process Merge model areas Universe is workers who live and work in the region Area ratio at work end Weighted population ratio at residence end Worker flows that are equal to four are converted to five Ratios less than one percent ignored

7 Data Development Results FLOWS Residence CountyWork CountyCTPPMODEL Brevard 189,056 45,017 BrevardIndian River 3,445 2,752 Indian RiverBrevard 1, Indian River 39,072 35,120 Indian RiverSt. Lucie 2,907 2,644 Martin 34,150 29,294 MartinPalm Beach 9,926 9,548 MartinSt. Lucie 3,703 3,333 St. LucieIndian River 4,577 4,161 St. LucieMartin 15,166 13,006 St. LuciePalm Beach 4,248 3,755 St. Lucie 49,979 46,094

8 Data Development Results FLOWS Residence CountyWork CountyCTPPMODEL Broward 565, ,367 BrowardMiami Dade 115, ,027 BrowardPalm Beach 52,712 49,573 Miami DadeBroward 60,096 55,480 Miami Dade 823, ,066 Miami DadePalm Beach 3,843 3,164 Palm BeachBroward 37,685 36,057 Palm BeachMartin 2,289 2,132 Palm BeachMiami Dade 5,560 3,962 Palm Beach 421, ,823

9 Dynamic Visualization of JTW Flows Dynamic visualization of flows between residence and workplace TAZs ARCGIS desktop platform Database is flow data developed for model TAZ structure

10 Dynamic Visualization of JTW Flows Four classes of Scenarios One residence TAZ to One workplace TAZ One residence TAZ to Many workplace TAZs Many residence TAZs to Many workplace TAZs Internal Trips Can aggregate to County or State level Export results to text file

11 Summary and Future Work CTPP Data provided at same geography as Travel Demand models Helpful to validate HBW trip tables Visualization tool provides richer understanding of the flow between residence and workplace areas Next iteration of tool will include mode shares of JTW flow Drive Alone Shared Ride Transit Migrate to web based GIS platform

12 Acknowledgements Min-Tang Li Shi-Chiang Li Nanda Srinivasan