although the airport has been made larger, there have been efforts to limit this. because of the use of jet aircraft and the amount of traffic, congress passed the washington airport act of 1950. this caused the opening of dulles airport in 1962. problems with noise caused noise restrictions to be made. this happened before jet aircraft use began in 1966. the federal aviation administration put restrictions on national and four other airports in 1969 to limit problems with high amounts of traffic.