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.

Km	Exit	Junctions	To	Remarks
8.7		Alor Setar	FT 1 Sultan Abdul Halim Highway North FT 1 City Centre South FT 1 Kota Sarang Semut FT 1 Gurun FT 1 Sungai Petani	T-junctions
FT 78 Kuala Kedah Highway Start/End of highway
FT 78 8		Sultanah Bahiyah Highway	FT 255 Sultanah Bahiyah Highway North FT 7 Kangar FT 7 Alor Janggus FT 1 Kepala Batas FT 1 Jitra North–South Expressway Northern Route AH2 North–South Expressway Northern Route Hat Yai (Thailand) Bukit Kayu Hitam South Sungai Petani Gurun Kota Sarang Semut North–South Expressway Northern Route AH2 North–South Expressway Northern Route Kuala Lumpur Ipoh Penang Pendang	Junctions
		Taman Pelangi
		Kampung Teluk Chengai	Kampung Masjid Lama
		Kampung Teluk Kechai
		Kampung Teluk Layang
		Kampung Lorong Ayer Masin
		Jalan Pantai Barat Kedah	South K1 Jalan Pantai Barat Kedah Yan	T-junctions
		Taman Juragan
		Taman Bahtera
FT 78 Kuala Kedah Highway Start/End of highway
FT 78 0		Kuala Kedah	K365 Jalan Tok Pasai West Kuala Kedah ferry terminal (Ferry to Langkawi Island) East Kota Kuala Kedah	Junctions