Alexandria began construction Tuesday on the first segment of a transit corridor meant to eventually connect the Pentagon City and Braddock Road Metro stations.

The work that began this week focuses on the stretch of Route 1 between Potomac Avenue and East Glebe Road:

The project will add dedicated transit-only lanes to this segment of Route 1, which is just under a mile long.

Work is scheduled to wrap up in December 2013. Eventually, the goal is to connect the Pentagon City station in Arlington and the Braddock Road stop in Alexandria.

A bus rapid transit system would operate in the transitway beginning in 2014, with transit stations along the median at Potomac Avenue, Custis Avenue, Swann Avenue and East Glebe Road.

Once the bus service begins, Alexandria also plans to study converting the bus rapid transit lanes into space for streetcars, but the study and potential conversion would itself take several years.