The MAX Red Line is a route in the Metropolitan Area Express light rail system in the Portland, Oregon metropolitan area. The route, operated by TriMet, provides an airport rail link to Portland International Airport from Beaverton and downtown Portland.
The Airport MAX project was born, but the line was delayed after a North-South light rail proposal, part of which is today's MAX Yellow Line, was defeated at the polls. Instead, the Port and TriMet built the project through a Public-Private Partnership with the Bechtel Corporation. Bechtel agreed to pay for a large portion of the land cost of the line in exchange for rights to the Cascades development on empty land that the Port of Portland owned near I-205 and the Airport which is now under construction.
The line opened on September 10, 2001, one day before the September 11, 2001 attacks, which had the side effect of shutting down all air travel in the United States for several days.
Beginning in 2003, the Red Line's service was extended farther west along the existing Blue Line tracks, from downtown Portland to downtown Beaverton, to improve capacity between the Gateway area and Beaverton and also to provide a no-transfer airport connection for Westside MAX riders.