Highway 1 is a major highway in Malaysia, stretching from the capital city of Kuala Lumpur to the northern border of the country. It is the longest highway in Malaysia, covering a total distance of 1,821 kilometers. Along the way, it passes through many major cities and towns,
From Wikipedia
Federal Highway is a Malaysian controlled-access highway connecting the capital city of Kuala Lumpur, and Klang, the former capital of the state of Selangor. The highway starts from Seputeh in Kuala Lumpur to Klang, Selangor. It is the busiest highway in Klang Valley during rush hour from/to Kuala Lumpur. The Federal Highway is coded as Federal Route 2.