
Interstate 66
Interstate 66 is the only Interstate Highway running east/west through Fairfax County and into/out of Washington, D.C., which makes this road easily one of the most used in the region.
Credit: Visit Fairfax

Interstate 66 is the only Interstate Highway running east/west through Fairfax County and into/out of Washington, D.C., which makes this road easily one of the most used in the region.
Credit: Visit Fairfax