What is the maximum altitude at which VFR traffic can be operated without special authorization?

The maximum altitude at which VFR (Visual Flight Rules) traffic can operate without special authorization is typically FL200, or 20,000 feet. This altitude is significant because it marks the upper limit for VFR operations under standard regulations, allowing pilots to operate under visual flight conditions while maintaining separation from IFR (Instrument Flight Rules) traffic.

Above this altitude, special authorization is required due to increased air traffic complexity and the likelihood of encountering airspace where IFR operations are prevalent. This regulation helps ensure safety by ensuring that VFR traffic does not inadvertently infringe on controlled IFR airspace where separation requirements are much stricter.

Maintaining VFR operations at or below FL200 allows pilots to navigate more freely while retaining visual reference to the ground, which is essential for adhering to VFR principles. Thus, FL200 serves as an important safety threshold in aviation regulation.