The Veirs Mill Road Line, designated Route Q2, Q4, Q6, is a daily bus route operated by the Washington Metropolitan Area Transit Authority between Silver Spring station and Shady Grove station of the Red Line of the Washington Metro. The line operates every 16–30 minutes at all times at a combined frequency of 10 minutes during weekday peak-hours, 15 minutes during the weekday midday and weekends, and 30 minutes during the late nights. All trips roughly take 55–60 minutes. The line operates along the Veirs Mill Road corridor connecting passengers to various Metro stations and communities.

Silver Spring station is a train station on the Red Line of the Washington Metro and the Brunswick Line of the MARC Train commuter rail system. The Metro station averaged 4,536 daily riders in 2023, making it the 19th-busiest stop in the network and the busiest in the state of Maryland. Trains travelling south from the station quickly cross the border into Washington, D.C., while northbound trains head underground and make their way further into Montgomery County.