Center. This was done in an effort to increase capacity between Gateway Transit Center and Beaverton, and to provide a one-seat ride to the airport for westside riders. Regular use of two-car trains on the line began in September 2005, when overcrowding prompted TriMet to change most Yellow Line service from two-car consists to single cars in order to convert the Red Line to two-car trains. On March 2, 2008, three trips in each direction during the morning and evening rush hours began operating between the and Portland International Airport stations to provide further additional capacity on the Blue Line amid growing ridership. Track improvements and extension to Hillsboro In October 2017, TriMet, citing system-wide delays caused by the single-track segments along the Airport MAX, announced the MAX Red Line Improvements Project, later renamed "A Better Red". The project proposed adding a second track to existing single-track segments between Gateway Transit Center and Portland International Airport station to allow trains to pass one another. To qualify for federal funding, TriMet included extending Red Line service farther west along existing Westside MAX tracks from Beaverton Transit Center to Fair Complex/Hillsboro Airport station in Hillsboro and creating a one-seat option from ten existing stations to Portland International Airport. Preliminary design work began in February 2018. TriMet adopted a locally preferred alternative in April 2019 and submitted the plan to the FTA to request funding. In May 2020, the FTA announced $99.99 million for the project through the Capital Investment Grants program. Final design was completed by engineering firm Parametrix in early 2021. The design includes two new bridges north of Gateway Transit Center to accommodate the second track and a new MAX platform called "Gateway North". TriMet received the FTA grant and broke ground on September 29, 2021. From April 2–9, 2022, Red Line service was suspended to make way for construction, and shuttle buses operated between Gateway Transit Center and Portland International Airport. The project is expected to be completed in 2024. Route The Red Line serves the Airport MAX extension, which is long. The extension begins just south of Gateway Transit Center where it branches from the Eastside MAX segment, makes a 180-degree loop, and heads north along the east side of I-205. Near Rocky Butte, it enters a tunnel beneath the northbound lanes of the freeway and emerges along the median. Just south of the Columbia Slough, the route