1 / 24

Using LEHD Data for Travel Demand Models : The Florida Experience

Using LEHD Data for Travel Demand Models : The Florida Experience. presented by Krishnan Viswanathan Cambridge Systematics, Inc. Co-authors Vidya Mysore, Florida Department of Transportation Nanda Srinivasan, Cambridge Systematics, Inc. May 7, 2007. Outline. Motivation

reid
Download Presentation

Using LEHD Data for Travel Demand Models : The Florida Experience

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Using LEHD Data for Travel Demand Models : The Florida Experience presented byKrishnan Viswanathan Cambridge Systematics, Inc. Co-authorsVidya Mysore, Florida Department of TransportationNanda Srinivasan, Cambridge Systematics, Inc. May 7, 2007

  2. Outline • Motivation • Longitudinal Employer Household Dynamics (LEHD) Description • Some Comparisons • FSUTMS Data Analysis • Summary • Future Directions

  3. Motivation Review and possible use of LEHD and Employment data for travel demand modeling • Current and future directions of Census and other available data sources for transportation • Review of QCEW [Quarterly Census of Employment and Wages] (Employment data from AWI, state agency) and LEHD Data • Data integration

  4. LEHD Description • LEHD combines federal and state administrative data on employers and employees with core Census Bureau censuses and surveys • Local Employment Dynamics (LED) is a voluntary partnership between state labor market information agencies and the U.S. Census Bureau to develop new information about local labor market conditions

  5. LEHD Description • The data for LEHD will be based on Quarterly Census of Employment and Wages (QCEW/ES-202) • Number of people employed and the wages paid to the employees each quarter • Multi-establishment employers also provide individual worksite data • Preliminary annual data are available in June and final annual data are available in October of each year. Quarterly data are available six months after the end of each quarter

  6. LEHD Description Origin Destination Database Home Block (U/I Wage Data) Workplace Block (QCEW Data) # of Workers (primary job) and # of Jobs • Home Profile – block group • # workers • Worker distribution • age • earnings • industry • Work Profile – block group • # establishments • # workers • Worker distribution • age • earnings • industry • Demand/ Growth Indicators • Job creation/loss • Hires/separations • Earnings hires/separations Acknowledgments : US Census Bureau

  7. LEHD Description Origin Destination Database

  8. LEHD Description OD with ACS: Possible Model for Integration • ACS Data • Trip Time • Mode • Distance Home Block (U/I Wage Data) Workplace Block (QCEW Data) # of Workers (primary job) and # of Jobs • Work Profile – block group • # establishments • # workers • Worker distribution • age • earnings • industry • Demand/ Growth Indicators • Job creation/loss • Hires/separations • Earnings hires/separations • Home Profile – block group • # workers • Worker distribution • age • earnings • industry Acknowledgments : US Census Bureau

  9. Some Comparisons An old well reviewed favorite – CTPP New kid on the block – LEHD North East Regional Planning Model (NERPM) region – Duval, St. Johns, Clay and Nassau Counties (Jacksonville is major city) CBD

  10. Some ComparisonsTravel Statistics • 98 percent (CTPP) vs. 77 percent (LEHD) travel within region • Similar results in an earlier BTS Study by Cesar Singh • Under a quarter of LEHD travel is outside the region • Travel shares to CBD is approximately the same

  11. Some Comparisons Residual Plot

  12. Some Comparisons CBD Distance LEHD – Primary Jobs CTPP

  13. Some Comparisons CBD Distance

  14. FSUTMS Data Analysis • Models Used • QCEW Data Analysis • Comparison between InfoUSA and QCEW data • Results

  15. Models Used 2005 NERPM CF Model 2000 Polk TPO Model

  16. QCEW (ES202) Data Analysis • December 2004 data used for analysis • Data overlaid to TAZ • Geocoded the data for address matching • ZDATA2 data developed from QCEW Data

  17. Comparison between InfoUSA and QCEW Data

  18. Results Model HBW Trips LEHD Primary Jobs

  19. Results Model HBW Trips CTPP JTW Trips

  20. Results Model HBW Trips LEHD Primary Jobs

  21. Results Model HBW Trips CTPP JTW Trips

  22. Summary • Under reporting of internal trips • Model results are reasonable • QCEW data good source for employment data • Issues regarding data suppression

  23. Future Directions • Potential data source for model calibration, more review of long distance trips to work • Coordination effort for data aggregation with AWI • Work with Census Bureau to produce LEHD for Florida model • Variability of data over time

  24. Acknowledgments • Jim Baxter, Modeling Manager, FDOT District 1 • Milton Locklear, Modeling Manager, FDOT District 2 • Kathie Hughes, David Thurmond, AWI • Pam Schenker, ex-AWI

More Related