The Kilometre Zero of the Federal Route 77 starts at the Malaysia-Thailand border near Pengkalan Hulu Checkpoint, Perak.

This road has a notable history especially during World War II and the Communist insurgency in Malaysia (1968–89).

On 17 June 1968, to mark the 20th anniversary of their armed struggle against the Malaysian Government, the Communist Party of Malaya (CPM) launched an ambush against security forces in the area of Kroh–Betong road not far between Pengkalan Hulu town and Malaysia-Thailand border.

The Federal Route 77 was put under strict security control by Malaysian army.

At most sections, the Federal Route 77 was built under the JKR R5 road standard, allowing maximum speed limit of up to 90 km/h.