A cable pathway divider, for installation on a cable runway, includes a pair of post halves and a ring-shaped locking member. Each post half includes a base portion and an extension portion, and the base portions of the post halves are arrangeable at opposite sides of a cross member of a cable runway. The post halves are securable to one another from opposite sides of the cross member, via clamping arrangement of the ring-shaped locking member relative to the post halves, such that the extension portions extend into a space above the cable runway to divide the cable runway into at least two cable paths.