Ideally, routes are branchless. In practice, marked branches are frequently encountered. They fulfil functions such as connection, alternative, approach or excursion. With this role assignment, the main route becomes branchless.
<a href="//commons.wikimedia.org/w/index.php?title=User:Robhubi&amp;action=edit&amp;redlink=1" class="new" title="User:Robhubi (page does not exist)">Robhubi</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>