What route must JAN APCH clear departing aircraft on?

Clearing departing aircraft on the route of "Direct JAN VORTAC then the obtained route/altitude from ZAE" is crucial for ensuring that aircraft have a clear and structured route from the departure point to the enroute airspace. The JAN VORTAC serves as a central navigate point for departures, allowing for a standardized and predictable flight path. This not only facilitates the sequencing of departure traffic but also ensures that aircraft enter the enroute airspace efficiently.

Using the JAN VORTAC as a reference point provides a framework for air traffic controllers to manage departure traffic, maintain separation, and communicate the planned routing effectively to pilots. This practice aligns with standard procedures that prioritize safety and operational efficiency.

While the other options provide flexibility or may seem advantageous in certain circumstances, they lack the structure of routing directly to the VORTAC followed by the prescribed route/altitude. B allows for any waypoint at the pilot's request, which may lead to congestion and uncoordinated movements. C focuses solely on the nearest VORTAC, which might not align with the intended route of departure, and D suggests adjustments based on traffic conditions, which could complicate navigation and disrupt the established operational flow.