Interstate 84 (
I-84) in the U.S. state of
Oregon, also known as the Vietnam Veterans Memorial Highway, travels east–west, following the
Columbia River and the rough path of the old
Oregon Trail from
Portland east to
Idaho. For this reason, it is also known as most of the
Columbia River Highway No. 2 and all of the
Old Oregon Trail Highway No. 6 (see
Oregon highways and routes). It also follows along or near
U.S. Route 30. The entire highway carried the designation I-80N (or I-80 North) until 1980, when this was changed to I-84.