The porch spanning the driveway in front of the main entrance has electrically operated glass doors, and when a car carrying the president, vice president or their guests drives into the porch, these glass doors are automatically closed and are not opened again until the guests have alighted and entered the lobby.
迴車道在正大門前裝有電動玻璃門，當正副總統和賓客的座車駛入後，玻璃門會自動關閉，等他們下車進入敞廳後，才會重新開啟。