State officials hope to keep the Federal Transit Administration from considering nearly a quarter-billion dollars’ worth of road, equipment and station improvements as it weighs approval of funding for the extension of Metrorail to Dulles.

The expenditures range from $73.7 million for major upgrades on Route 7 to $1.5 million to bring new stations up to Metro’s recently adopted wireless Internet standards, according to a list provided by the Dulles Corridor Metrorail Project on Tuesday.