Incorporating the 10th Edition Institute of Traffic Engineers (ITE) Trip Generation Rates Into Virginia Department of Transportation Guidelines

The Institute of Transportation Engineers (ITE) released the Trip Generation (TG) 10th edition in 2017, which significantly updated its database, and some of its trip generation rates were substantially lower than those of earlier editions. This study aims to investigate the applicability of the TG 10th edition in various Virginia contexts and to recommend how to incorporate the TG 10th edition into state guidelines. The research team surveyed 31 state transportation agencies to obtain a clear understanding of current practices in the adoption of trip rates and trip estimation approaches. They systematically compared trip rates of TG 9th and 10th editions using hypothesis tests and identified land uses with significant rate reduction. Trip generation data were collected from 37 sites in Virginia during weekday PM peaks for the mixed-use sites and single-use sites with significantly reduced 10th edition rates (multi-family low-rise and general office). To investigate the use of trip rates in different settings, general offices in both general urban/suburban and dense multi-use urban were considered. For mixed-use developments, the research team explored the combinations of four internal trip capture models and TG rates of 9th and 10th editions to identify the best trip estimation approach. Given that all trip data were collected after the outbreak of the COVID-19 pandemic, Streetlight data were used to adjust trip counts to account for the impacts of COVID. This study recommends that the Virginia Department of Transportation (VDOT) Office of Land Use: 1) accept the TG 10th edition for the development of a Traffic Impact Analysis (TIA) should the 8th or 9th edition rates show a TIA is required and select 10th edition trip rates according to settings; and 2) accept the methodology presented in Trip Generation Handbook 3rd edition to estimate internal trip capture for mixed-use developments. This project will provide benefits to VDOT by improving the estimation of trip generation, which is critical in determining charges to developers for transportation improvements and making decisions concerning the modification of existing facilities and the design of new facilities.

• Record URL:
  https://www.virginiadot.org/vtrc/main/online_reports/pdf/22-R6.pdf
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/60454
• Corporate Authors:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903

  Virginia Department of Transportation

  1401 East Broad Street
  Richmond, VA  United States  23219

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Xie, Kun
  • Cetin, Mecit
  • Yang, Hong
  • Dong, Xiaomeng
• Publication Date: 2021-8

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Maps; Photos; References; Tables;
• Pagination: 58p

Subject/Index Terms

• TRT Terms: COVID-19; Data collection; Mixed use development; Suburbs; Trip generation; Urban areas
• Identifier Terms: ITE Trip Generation Manual; Trip Generation Handbook. Third Edition (2014)
• Geographic Terms: Virginia
• Subject Areas: Highways; Planning and Forecasting;

Filing Info

• Accession Number: 01779745
• Record Type: Publication
• Report/Paper Numbers: FHWA/VTRC 22-R6, VTRC 22-R6
• Contract Numbers: 116549
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Aug 24 2021 11:34AM