Document Type

Working Paper

Publication Date



Transportation -- Oregon -- Political aspects, Sustainable urban development, Transportation and state, Urban Land Use -- Oregon -- Portland


This paper is a case study of the evolution of Oregon’s groundbreaking Transportation Planning Rule, from its adoption in 1991, up through present amendments. Our analysis is an assessment of how private- and public-sector investors grapple with the coproduction of the built environment under the constraints of a value system that emanates from the state, shepherded by litigious public interest groups. In this case, this value system is articulated in the Oregon administrative rule known as the Transportation Planning Rule. This Rule emphasizes a reduction in the reliance on automobiles and, among other things, requires a decrease in vehicle miles traveled by 20 percent and a decrease in parking spaces by 10 percent over 30 years.

The present research builds on our earlier study of the Rule. Our presentation at ACSP in 1995 followed a 1994 chapter by Adler in Planning the Oregon Way.1 Now, three years after our last presentation, we will discuss where the Rule is today and the nature of the lessons that are to be learned from an analysis of its implementation over the past seven years.


Catalog Number DP98-8.

A production of the Center for Urban Studies, College of Urban and Public Affairs, Portland State University.

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