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How does upzoning impact land use and transport: a case study of Seattle
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How does upzoning impact land use and transport: a case study of Seattle

Author

Listed:
  • Naifu Fan
  • Kara M. Kockelman
  • Peter Caballero
  • Jason Hawkins
  • Xiaohong Chen

Abstract

This work simulates the long-term land use and transportation impacts of upzoning in the region of Seattle, Washington at the parcel level, using UrbanSim and an agent-based travel demand model (SoundCast). Scenario results are compared to illuminate differences in a Business-as-Usual (BAU) future versus two upzoning scenarios that upzone all single-family-use residential parcels in the region or just those in the City of Seattle to 3 dwelling units per parcel. Under BAUえーゆー, affordability falls 20% and rents rise 6% between 2014 and 2050, as the regional population grows to 5.7 million. With regional upzoning, 68,400 more dwellings are added, with rents 10% lower compared to the BAUえーゆー future. The housing affordability index falls from 75.3 to 67.31, a significant improvement over the BAUえーゆー scenario's sharper fall to 60.6. If only the City of Seattle upzones, only 3,400 additional units are predicted, but rents are 5.2% lower than the BAUえーゆー case.

Suggested Citation

  • Naifu Fan & Kara M. Kockelman & Peter Caballero & Jason Hawkins & Xiaohong Chen, 2024. "How does upzoning impact land use and transport: a case study of Seattle," Transportation Planning and Technology, Taylor & Francis Journals, vol. 47(5), pages 656-680, July.
    • Handle: RePEc:taf:transp:v:47:y:2024:i:5:p:656-680
    DOI: 10.1080/03081060.2024.2311829
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