Route background The Kilometre Zero of the Federal Route 1 is located at the Malaysia-Singapore border at Johor-Singapore Causeway. At the first kilo

Route background

The Kilometre Zero of the Federal Route 1 is located at the Malaysia-Singapore border at Johor-Singapore Causeway. At the first kilometre at the city of Johor Bahru, it is connected with the Federal Route Jkr-ft3.png, the main trunk road of the east coast of Peninsular Malaysia. Next, at Kilometre 19 which is at Skudai, the route is connected with the Federal Route Jkr-ft5.png which is the main trunk road of the west coast of Peninsular Malaysia.

The Federal Route 1 is the main trunk road at the central part of Peninsular Malaysia but passes the western states. At Sungai Siput, Perak, the route changes its direction westbound and later become the main west coastal route, starting from Changkat Jering, Perak to Alor Setar, Kedah. The route meets with the North-South Expressway Northern Route at Jitra, Kedah and the section of the North-South Expressway from Jitra to Bukit Kayu Hitam is a part of the Federal Route 1.