Developing a 3-Item Transportation Security Index

The US DOT is committed to advancing transportation equity. Extant research has shown significant disparities by demographic group and geography in who experiences transportation insecurity in the US. The Transportation Security Index (TSI) is a measurement tool that enables the US DOT to assess the extent to which they are achieving their transportation equity objectives and ameliorating these disparities. This project aims to develop and validate a 3-item TSI, a measure designed to directly capture the experience of transportation insecurity at the individual level regardless of mode of transit or geography. Currently, there is a validated 16-item longform TSI and a 6-item shortform. However, questionnaire length directly impacts survey costs and respondent burden. To make it easier for planners, researchers, and policymakers to utilize the TSI in their own work, an even shorter shortform is needed. To develop a preliminary 3-item shortform the research team will use existing qualitative and quantitative data. The team will then seek to replicate and validate this shortform by fielding an original nationally representative survey. To validate the shortform, the team will assess the level of agreement between the TSI3 and the TSI6. The team will also compare the predictive power of each of these TSI forms by examining how they each are associated with key outcomes, including physical and mental health. To demonstrate the utility of the TSI tool, The team will draw on data from the Detroit Metropolitan Area Communities Study to produce a report examining transportation insecurity in Detroit.

• Record URL:
  https://ccat.umtri.umich.edu/research/u-m/developing-a-3-item-transportation-security-index/

Language

• English

Project

• Status: Active
• Funding: $200800
• Contract Numbers:

  69A3552348305

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590

  Michigan Department of Transportation

  Van Wagoner Building
  425 W. Ottawa Street
  Lansing, MI  United States  48909
• Managing Organizations:

  University of Michigan Transportation Research Institute

  2901 Baxter Road
  Ann Arbor, Michigan  United States  48109
• Project Managers:

  Stearns, Amy

  Bezzina, Debra

• Performing Organizations:

  University of Michigan Institute for Social Research

  P.O. Box 1248
  426 Thompson St.
  Ann Arbor, MI  United States  48109-1248
• Principal Investigators:

  Murphy, Alexandra

• Start Date: 20240522
• Expected Completion Date: 20250605
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Equity; Surveys; Transportation disadvantaged persons
• Geographic Terms: Detroit (Michigan)
• Subject Areas: Society; Transportation (General);

Filing Info

• Accession Number: 01929586
• Record Type: Research project
• Source Agency: Center for Connected and Automated Transportation
• Contract Numbers: 69A3552348305
• Files: UTC, RIP
• Created Date: Sep 5 2024 10:30AM