SR 644 (Fairfax County)
State Route 644 is a secondary state highway in southern Fairfax County, Virginia. It is the closest main east–west road that is south of the Beltway. It is known primarily as Franconia Road east of I-95, and Old Keene Mill Rd west of I-95. Its intersection with I-95, which is right near the Springfield Mall, was part of the major eight-year Springfield Interchange rebuilding project that was completed in July 2007.
Read more about this topic: List Of Secondary State Highways In Virginia