Kuala Kedah Highway, Federal Route 78, is a major highway in Kedah, Malaysia.

It is also a main route to Langkawi Island via Kuala Kedah.

[1] The Kilometre Zero of the Federal Route 78 starts at Kuala Kedah.

At most sections, the Federal Route 78 was built under the JKR R5 road standard, allowing maximum speed limit of up to 90 km/h.

This Malaysia road article is a stub.