The 23A, 23B, and 23T operate out of Four Mile Run Division 7 days a week. Route 23A only operates during late nights daily and early mornings on Saturdays and Sundays. The 23A runs the full route between Tysons Corner Center and Crystal City. The 23A also runs through other neighborhoods such as McLean, Rock Springs, Buckingham, Nauck, Parkfairfax, Arlington Ridge, and Aurora Highlands. Routes 23B and 23T operate on daily schedules with the same intervals, with transfers between Ballston station and Shirlington Transit Center. The 23B operates between Ballston station and Crystal City station, while the 23T operates between Tysons Corner Center and Shirlington Transit Center.
