High Quality Content by WIKIPEDIA articles! The Fairfax County Parkway, which is officially numbered State Route 286 (SR 286, formerly SR 7100), is a primary state highway in the U.S. state of Virginia. It provides a north–south arterial route in Fairfax County with a mix of interchanges and signalized and unsignalized intersections. Its alignment roughly corresponds to part of the once-proposed Outer Beltway around Washington, D.C. The first segment of the roadway opened in 1987; the road was completed in 2010. In February 2012, SR 286 and SR 289 were transferred to primary roads from their secondary status as SR 7100 and SR 7900.