The western branch of the Pacific Highway, 99W was removed from the US highway system along with its eastern counterpart (99E) in 1972. Oregon 99W originates at its split with 99E in Junction City north of Eugene and enters the southern Portland Metro Area at Sherwood. Passing through Tualatin, King City, and Tigard, the highway enters Portland city limits at its junction with Interstate 5 (I-5 exit 294).
Inside SW Portland, Oregon 99W travels along SW Barbur Boulevard to and from downtown and it is briefly coupled with Oregon 10 just south of downtown. From there, the exact northern terminus of 99W is quite hazy, though it probably ends just south of the southern Interstate 5/ Interstate 405 stack interchange, where Naito Parkway meets U.S. 26 at the west end of the Ross Island Bridge. The ODOT official state highway map shows it continuing past the interchange along Naito Parkway.
North Interstate Avenue (former U.S. 99W/ Oregon 99W) at North Alberta Street. The Interstate Avenue MAX line that now bisects this arterial street was completed in 2004. Photo by Matt Strieby (06/18/06).
Historically, U.S. 99W ran through the heart of downtown Portland and crossed the Willamette over the Broadway Bridge. There it continued north as Interstate Avenue until it rejoined U.S. 99E just south of the Columbia River. During the 1950s, it was rerouted along a newly-constructed controlled-access highway, Harbor Drive, and then crossed the Willamette over the Steel Bridge before being routed along Interstate Avenue. The “freeway revolt” that took hold in the city during the late 1960s and early 1970s brought the wrecking ball to most of Harbor drive, and the right-of-way was converted to Tom McCall Waterfront Park in 1974 (a fragment of Harbor Drive remains: traffic from exit 1A, I-405 northbound, is routed along a half-mile stretch of the old freeway before it turns to meet Naito Parkway). As a state route, 99W was routed along Front Avenue (Naito Parkway) to the Steel Bridge.5