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1221 SW 4th Avenue, Room 110, Portland, OR 97204
Under Title 33, a development in a commercial/ mixed use or multi-dwelling zones that includes a building with more than 10 new dwelling units and is close to transit is required to have a Transportation Demand Management (TDM) Plan approved prior to the issuance of a building permit.
These TDM Plans are meant to prevent, reduce, and mitigate the impacts of the new development on the transportation system, neighborhood livability, safety, and the environment, while providing safe and efficient mobility options.
Transportation Demand Management (TDM) Plans for Residential Uses Administrative Rule and Procedures Guide: view the adopted administrative rule here: https://www.portlandoregon.gov/citycode/article/685281
Selected Portland City Code Chapters related to the TDM requirement.