Republic road I-4 (Bulgarian: Републикански път I-4) is a major road in Northern Bulgaria.

It runs between I-3 road, at 5.8 km (3.6 mi) from Yablanitsa, and I-2 road, at the city of Shumen.

The total length of the road is 264.3 km (164.2 mi) and it follows the route of E772.

I-4 road is planned to be superseded by Hemus motorway (A2).

Road network of Bulgaria RIA This Bulgarian road or road transport-related article is a stub.