crosses over the southbound lanes as I-205 towards Cascade Station and proceeds northwest along the south side of Cascade Parkway. It follows this road then crosses it just before Mount Hood Avenue station. The line continues northwest along the south side of Airport Way until it reaches its terminus at Portland International Airport station. Beyond the Airport MAX, Red Line trains serve parts of the Westside and Eastside MAX segments; it interlines with the Blue Line from Beaverton Transit Center to Gateway Transit Center and the Green Line from Rose Quarter Transit Center to Gateway Transit Center. Although much of the Red Line runs along a double-track railway, two segments of the Airport MAX extension are single-tracked. The first segment starts near Gateway Transit Center and ends just north of Northeast Halsey Street. The other segment runs from south of the Northeast Airport Way and Northeast Airport Way Frontage Road intersection to just before the airport terminus. TriMet is adding a second track to both segments by 2024 as part of the A Better Red project. Stations The Airport MAX extension consists of four stations; from north to south they are: Portland International Airport, Mount Hood Avenue, , and Parkrose/Sumner Transit Center. Red Line service runs from Portland International Airport station to Beaverton Transit Center, a total of 26 stations. The Red Line interlines with the Blue and Green lines along the Eastside and Westside MAX segments; it shares 22 stations, from Beaverton Transit Center to Gateway Transit Center, with the Blue Line, of which eight stations, from Rose Quarter Transit Center to Gateway Transit Center, are additionally shared with the Green Line. Transfers to the Green (beyond the interline segment), Orange, and Yellow lines, via the Pioneer Courthouse and Pioneer Place stations along the Portland Transit Mall, can be made by detraining at the Pioneer Square stations. Another transfer to the Yellow Line, via Interstate/Rose Quarter station, can be made at Rose Quarter Transit Center. The Red Line also provides connections to local and intercity bus services at various stops across the line, the Portland Streetcar at four stops within Portland's Central City, and WES Commuter Rail at Beaverton Transit Center. A Better Red will extend Red Line service to Fair Complex/Hillsboro Airport station in 2024 using the existing Westside MAX alignment, as well as construct an infill station north of Gateway Transit Center called "Gateway North". Service TriMet