According to Interstate 50th Anniversary: The Story of Oregon’s Interstates, the Interstate 505 freeway spur was planned to open up the industrial areas along Yeon Avenue; the freeway would have been routed on or along this section of U.S. 30. It would have extended from Interstate 405 in Downtown Portland to U.S. 30 Bypass where U.S. 30 changes into St. Helens Road. The course would have traveled through a considerable number of residential buildings and along the fringe of Forest Park. These factors ultimately caused Interstate 505 to join in Oregon’s Great Freeway Kill Off in the mid-1970s.2
The state of Oregon redirected federal Interstate dollars allocated for I-505 for an array of projects. These included funds for completing Interstate 205, Portland area highway improvements on U.S. 26 (Sunset Highway), Oregon 212, and Oregon 217 and other roads, and construction of mass transportation systems including the “Banfield Transitway Project”.