This is the 9532nd most frequent Russian word.
федеральная
"Federal."
Here, the word 'федеральная' (federal) is used as an adjective describing a highway that is under federal jurisdiction or spans a larger territory under a national government.
Федеральная трасса соединяет Москву и Санкт-Петербург.
The federal highway connects Moscow and Saint Petersburg.
The term 'федеральный' (federal), closely related to 'федеральная', describes a law enacted at the federal or national level, applying across an entire federation.
Федеральный закон регулирует права и обязанности граждан.
The federal law regulates the rights and duties of citizens.
'Федеральные' (federal) here functions as an adjective describing authorities or government bodies operating on a national or federal level.