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VFR Flyways are depicted on the reverse side 

of some of the VFR Terminal Area Charts (TAC), 
commonly referred to as Class B airspace charts. (See 


1.) Eventually all TACs will include a VFR 

Flyway Planning Chart. These charts identify VFR 
flyways designed to help VFR pilots avoid major 
controlled traffic flows. They may further depict 
multiple VFR routings throughout the area which 
may be used as an alternative to flight within Class B 
airspace. The ground references provide a guide for 
improved visual navigation. These routes are not 
intended to discourage requests for VFR operations 
within Class B airspace but are designed solely to 
assist pilots in planning for flights under and around 
busy Class B airspace without actually entering 
Class B airspace. 


It is very important to remember that these 

suggested routes are not sterile of other traffic. The 
entire Class B airspace, and the airspace underneath 
it, may be heavily congested with many different 
types of aircraft. Pilot adherence to VFR rules must 
be exercised at all times. Further, when operating 
beneath Class B airspace, communications must be 
established and maintained between your aircraft and 
any control tower while transiting the Class B, 
Class C, and Class D surface areas of those airports 
under Class B airspace. 

b.  VFR Corridors. 


The design of a few of the first Class B 

airspace areas provided a corridor for the passage of 
uncontrolled traffic. A VFR corridor is defined as 
airspace through Class B airspace, with defined 
vertical and lateral boundaries, in which aircraft may 
operate without an ATC clearance or communication 
with air traffic control. 


These corridors are, in effect, a “hole” 

through Class B airspace. (See FIG 3


2.) A classic 

example would be the corridor through the Los 
Angeles Class B airspace, which has been subse-
quently changed to Special Flight Rules airspace 
(SFR). A corridor is surrounded on all sides by 
Class B airspace and does not extend down to the 
surface like a VFR Flyway. Because of their finite 
lateral and vertical limits, and the volume of VFR 

traffic using a corridor, extreme caution and vigilance 
must be exercised. 



Class B Airspace 


Because of the heavy traffic volume and the 

procedures necessary to efficiently manage the flow 
of traffic, it has not been possible to incorporate VFR 
corridors in the development or modifications of 
Class B airspace in recent years. 

c.  Class B Airspace VFR Transition Routes. 


To accommodate VFR traffic through certain 

Class B airspace, such as Seattle, Phoenix and 
Los Angeles, Class B Airspace VFR Transition 
Routes were developed. A Class B Airspace VFR 
Transition Route is defined as a specific flight course 
depicted on a TAC for transiting a specific Class B 
airspace. These routes include specific ATC-assigned 
altitudes, and pilots must obtain an ATC clearance 
prior to entering Class B airspace on the route. 


These routes, as depicted in FIG 3


3, are 

designed to show the pilot where to position the 
aircraft outside of, or clear of, the Class B airspace 
where an ATC clearance can normally be expected 
with minimal or no delay. Until ATC authorization is 
received, pilots must remain clear of Class B 
airspace. On initial contact, pilots should advise ATC 
of their position, altitude, route name desired, and 
direction of flight. After a clearance is received, pilots 
must fly the route as depicted and, most importantly, 
adhere to ATC instructions. 

Other Airspace Areas