Transportation-Efficient Land Use Regulations and Their Application in the Puget Sound Region,Washington

Abstract

This work evaluates how local land use regulations and development patterns support transportation efficiency in urban and suburban areas. An efficient transportation system includes multiple transportation modes and reduces the need to drive alone. The research sheds light on how long-term efforts to devise transportation-efficient land development regulations have shaped new development. Data include surveys of zoning and development regulations in 19 study areas of Puget Sound, Washington, and reviews of 163 projects with a building permit. Analyses focus on the frequency of use of transportation-efficient elements in land use regulations, the frequency of adherence to these elements in projects, and the connections between area regulations and development. Fifty elements classified into six categories of transportation-efficient land use serve to evaluate the characteristics of regulations and permitted projects in each study area. The research shows that local jurisdictions have adopted many transportation-efficient regulations, and many of the projects reviewed follow these regulations. Compact development stands out as a major strategy used successfully in area regulations and permitted projects. Pedestrian-oriented environment and street–sidewalk connectivity are used at the project level but less so in regulations. Parking elements are weakest at the regulatory and project levels. Washington State growth management approaches to land use appear to become integrated into local regulatory frameworks and to be followed through in the implementation and development process. Work is needed regionally to increase the use of transportation-efficient land use strategies, with particular attention to parking regulations.

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