The 307 kilometres (191 mi) road connects Butterworth, Penang to Pasir Puteh in Kelantan.

[1] The highway also goes close to the border with Thailand and meets Jalan Kompleks CIQ Bukit Bunga at Bukit Bunga.

At the East–West Highway sections, the highway passing Kuala Rui, Lake Temenggor Bridge (West and East side), Banding Island, Belum Forest Reserve, Air Banun, Lake Pergau and finally at Jeli, Kelantan.

The Federal Route 4 then continues from Jeli towards Tanah Merah, Machang and finally at Pasir Puteh, where it meets with the Federal Route 3.

At most sections, the Federal Route 4 was built under the JKR R5 road standard, allowing maximum speed limit of up to 90 km/h.