Columbia Pike–Farragut Square Line

The 16Y operates from Four Mile Run Division every 5 minutes from 5:55 AM – 9:47 AM and 3:30 PM – 7:52 PM on weekdays during rush hours. Morning rush 16Y trips head to McPherson Square station, while afternoon rush 16Y trips head to the neighborhood of Barcroft. During morning 16Y trips, D.C. stops can only be alighted; during afternoon 16Y trips, D.C. stops can only be boarded.[2] The 16Y serves limited stops through the entire route, bringing faster service in Columbia Pike. The 16Y splits service from Columbia Pike to head towards Lyon Park from South Courthouse Road towards Arlington Boulevard (U.S. Route 50), all the way to D.C. through the Roosevelt Bridge (Interstate 66). Route 16Y is the only MetroExtra route that serves Virginia. Local Columbia Pike service is provided by Route 16E, Route 16G, and Route 16H. Local bus service is also provided on Arlington Transit Routes 42, 45, and 77 through the neighborhood of Lyon Park, and the Pershing Drive–Arlington Boulevard Line (Route 4A) through Arlington Boulevard up to Rosslyn.

Route 16Y began service on September 29, 2002, becoming the first bus route to run through Downtown D.C. since the opening of the Yellow Line in 1983.[1] The 16Y was also created by WMATA to provide limited stop/ express service between the neighborhood of Barcroft and McPherson Square station via Columbia Pike, Arlington Boulevard, and the Roosevelt Bridge.[2] The original 16Y route serves limited stops on Columbia Pike between South Four Mile Run Drive, and South Courthouse road, until it runs non stop to Downtown, serving all stops until McPherson Square station. The 16Y serves Farragut Square Station, both the North and the West side, before arriving to McPherson Square.

The 16Y became part of the Pike Ride route in 2003, alongside with the other 16 lines.[3] As part of the Pike Ride project, the 16Y brings in more faster service during rush hours through Columbia Pike.

The 16Y became a MetroExtra route in 2012, alongside with route 16F (later 16X) of the Columbia Pike–Federal Triangle Line.[4] This groups the 16Y, as an limited stop routes, while all other 16 lines are local routes which serves all stops in Columbia Pike. Alongside with the addition of MetroExtra Better Bus program, it brings more reliable service on the 16Y when more times was added throughout the years.[5]