It consists of service operated by the Washington Metropolitan Area Transit Authority (Metrobus) and Arlington Transit (ART), connecting the Pentagon and Pentagon City Washington Metro stations in Arlington County with Annandale in Fairfax County.

Route timetables and other useful information were implemented in numerous bus stops along the corridor, printed in both English and Spanish.

Among other additions, he acquired the former Washington, Alexandria and Mount Vernon Railway at foreclosure in 1930 and replaced it with buses in 1932.

In July 2016, the Arlington County Board approved a Transit Development Plan that includes enhanced bus service along Columbia Pike.

[10] This proposal, called a Premium Transit Network, has since been delayed until 2019 due to Metro rebuilding efforts.