Plain English Meaning
A pre-drawn path on the chart that lets a VFR pilot fly across the busy airspace around a major airport, as long as ATC gives them permission to use it.
Full Definition
A specific flight path published on a VFR Terminal Area Chart that allows VFR pilots to fly through Class B airspace under an ATC clearance. The route defines the headings, altitudes, and entry and exit points the pilot is expected to follow once cleared by the controlling facility.
Context Anchor
Seen on VFR charts and terminal area charts near major airports with Class B airspace, especially when planning to fly across or through that area instead of going around it.
Derivation
Transition comes from the Latin transire, meaning to go across. The route is literally a way to go across the Class B airspace rather than around or above it.
Why Pilots Care
These routes reduce the chance of airspace violations and help VFR pilots cross high-traffic zones safely without needing full IFR clearance.
Intuition Check
Do not assume “published route” means automatic permission to enter. The route shows the planned path; air traffic control clearance is still required before entering Class B airspace.
Example Sentence 1
Approaching the LAX area, the pilot requested the Mini Route, a published Class B airspace VFR transition route, and received clearance to proceed at 3,500 feet.
Example Sentence 2
Following the Class B airspace VFR transition route kept the flight clear of the primary arrival corridors.