** FILE ** This Dec. 14, 2006, file photo shows Washington traffic at rush hour on Interstate 395 near Seminary Road in Alexandria, Va. (AP Photo/Jacquelyn Martin, File)

Photo by: Jacquelyn Martin

** FILE ** This Dec. 14, 2006, file photo shows Washington traffic at rush hour on Interstate 395 near Seminary Road in Alexandria, Va. (AP Photo/Jacquelyn Martin, File)