WES Commuter Rail, or
Westside Express Service, is a United States
commuter rail line between
Beaverton and
Wilsonville, Oregon, in the
Portland metropolitan area, mostly following busy
Oregon Highway 217 and
Interstate 5. The diesel-powered passenger rail service opened in February 2009 on upgraded existing freight rail tracks owned and operated by the
Portland & Western Railroad (P&W).
TriMet, the metropolitan area's regional transit agency, manages and funds the service, and it also owns and maintains the railcars and stations, but P&W staff operate the vehicles. In planning since the mid-1990s, the line has five stations: two in Beaverton, one in
Tigard, one in
Tualatin, and one in Wilsonville.