(I'm a U.S. native speaker). I would just call it "an intersection." Much depends on the details of the specific junction, and what it is called locally.
A "fork" in the road is fairly specific; it means that road you are on divides into two different roads, each of which continues in almost the same direction as the road you are on. You hardly make any turn at all. You just "bear left" or "bear right." Very often, one of those two roads has the same name and technically is the same road as the road you were on.
If five roads meet in a single point, or almost a single point, it would be called "a five-way intersection." Such intersections often get the local name "Five Corners."
On a highway, where the division of the road is carefully engineered, it is often called "a split."