Interstate 84 (west)

Interstate 84 (west)

Interstate 84 (I-84) is an Interstate Highway with two non-contiguous sections. This western section runs from Portland, Oregon, to a junction with Interstate 80 near Echo, Utah. The highway originally served as a fork of I-80 to serve the Pacific Northwest, and was originally numbered Interstate 80N.

The highway serves and connects Portland, Oregon and Boise, Idaho with Ogden, Utah. Seattle, Washington is indirectly served by I-84 via a connection with Interstate 82. With the connection to I-80, I-84 connects these cities to points east.

I-80N was generally built along the corridor of U.S. Route 30 and U.S. Route 30S; the U.S. Route 30S designation was decommissioned in the 1970s after the freeway replacement was mostly complete. The highway was signed with the I-84 designation in 1980, when a 1977 change in guidelines took effect that discouraged highway numbers with directional suffixes. The renumbering resulted in two highways being numbered I-84, with the other located in the Northeastern United States.