How are the widths of VR route segments defined?

The correct answer relates to the fact that the widths of VR (Visual Flight Rules) route segments are specifically defined by the military. VR routes are established for military operations and are utilized primarily by military aircraft. The military's guidelines take into account operational needs, safety considerations, and airspace usage for such routes.

While federal aviation guidelines and the FAA do have roles in the broader context of air traffic management and civilian airspace, the specific definition of the widths of VR route segments falls under military authority. Local air traffic control may assist in managing these routes during their operation, but they do not set the widths; this responsibility lies with the military's regulations and standards for VR routes.