Skip to main content
Home

Main navigation

  • About
    • About TREC
    • Advancing Equity
    • Our Staff
    • Our Researchers
    • Contact Us
  • News
    • Latest News
    • Join Our Mailing List
    • Media Coverage
  • Programs
    • Transportation Data
    • The Initiative for Bicycle and Pedestrian Innovation
    • Community Transportation Academy
    • TREC Resource Hub
    • PacTrans
    • Better Block PSU
    • Workforce Development
    • National Institute For Transportation And Communities
  • Events
    • Upcoming Events
    • Transportation Seminars
    • BikePed Workshops
    • Study Abroad
    • Summer High School Camp
    • Ann Niles Lecture
    • Past Events
  • Research and Data
    • Research Areas
    • Researchers
    • All Projects
    • Final Reports
    • PORTAL: Portland-Vancouver
    • BikePed Portal: National
    • For Researchers
  • Study at PSU
    • Why Study at PSU?
    • Degrees and Courses
    • STEP Student Group
    • Graduate Research Assistants
    • Scholars
    • Sustainable Transportation Study Abroad
User account menu
  • Log in

TREC research addresses complex transportation problems by drawing on multiple disciplines, including engineering, planning, economics and design, from across the Portland State University campus. Use the search box at right to search for a specific project.

Research Highlights

Multimodal Trip Generation, Vehicle Ownership and Use: Characterizing The Travel Patterns of Residents of Multifamily Housing

Kelly Clifton
Many cities are reconsidering their reliance on ITE’s Trip Generation Manual, now in its 10th edition. Kelly Clifton and co-investigator Kristina Currans of the University of Arizona examine the advantages and limitations of ITE’s land use taxonomy for multifamily residences. They find that the land use categories aiming to capture intensity of development for residential land uses (high-rise apartments, for example) do not appear to capture any more variation in the vehicle or person trip… Read More

Modeling Capacity: Multiple Weaving Areas

Sheida Khademi Behruz Paschai , James Williams
Systematic, well-designed research provides the most effective approach to the solution of many problems facing highway administrators and engineers. Traffic congestion on freeway systems is one significant concern in urban areas throughout the U.S.A. In this era, building new freeways to reduce congestion is less feasible due to the high capital and social costs. Thus, the effective management and operation of existing freeway facilities has become a preferred approach to reduce traffic… Read More

 

© 2025 | Transportation Research and Education Center | 503-725-8545 | asktrec@pdx.edu