Malaysia Federal Route 78Kuala Kedah Highway, Federal Route 78, is a major highway in Kedah, Malaysia. It is also a main route to Langkawi Island via Kuala Kedah.Route backgroundThe Kilometre Zero of the Federal Route 78 starts at Kuala Kedah.FeaturesAt most sections, the Federal Route 78 was built under the JKR R5 road standard, allowing maximum speed limit of up to 90 km/h.