Definition & Meaning of "branch line"

What is a "branch line"?

A branch line is a secondary railway route that connects to a main railroad line but serves a smaller area or specific destination. It usually diverges from the main track and leads to towns, cities, or industries that are not directly served by the primary line. Branch lines typically handle less traffic than main lines, but they are important for reaching places that would not otherwise have direct rail access. These lines often link to larger networks, allowing trains to distribute goods and passengers to more remote or less populated areas.