I believe I’m on the right track, but just need a little clarification.
In the referenced picture, the boxes which contain two altitude restrictions are a little confusing to me. Are they simply saying that there are two airspaces overlapping? I.E. Class D restriction from surface to 3300 ft, and then Class B restrictions for 4700 - 10000 ft.
I thought some of the Northeast airspace in my area was confusing…Then I started flying in southern California.
Yes you are correct. If you got to https://skyvector.com/ zoom in on KSAN on the tabs on the upper right click San Diego FLY it shows a VFR corridor. The arrows point to what sector it goes to.
This chart may better illustrate the VFR corridor. The dotted magenta line running NW/SE is followed above 3300’ and below 4700’. You stay to the right of the line.
This is very helpful information. Thank you!
Excellent. That clears it up perfectly for me. The picture I uploaded is from the us sectional overlay of LittleNavMap which unfortunately doesn’t show the VFR corridors. Thanks for the help!
That is not quite correct. The boxes say it is Class B, not Class D, from SFC to 33 and from 28 to 33. Then it is Class E up to 4700, and Class B again up to 10000.
In a part of the lower area there is also a Class D from the surface up to but not including 2800. In another part of the lower area it is Class E from the surface up to 2800 ft. I think there is a little sliver that is Class G up to 700 ft and then Class E to 2800, but I am not sure, cannot quite make out what is to the inside and the outside of that Class E surface area.
So yeah that’s a lot of airspaces!
Always reverse the TAC 
The truth is on the other side, the FLY
The first time I departed westbound from Montgomery field, this hole/corridor in the Bravo confused me. Still wandering if I’ll be able to climb faster enough to be above 3200ft or stay below 1800ft.
Got it. So is a VFR corridor like this 100% expected to be flown by the pilot, even if not specifically instructed by ATC prior to take-off?
Also, if given a specific heading and altitude to fly…those would of course override the VFR corridor, if they differed, correct?
Imagine the FLY chart and all the big blue routes depicted as a way to circulate around class Bravo airspace without disturbing ATC and the regular flow of trafic. ATC’s expect you fly these routes without clearance. But for VFR in this overcrowded airspace, it’s always a good idea to take Flight Following. NB: in FLY charts there are also VFR transition routes which required clearances.
Another good example of FLY chart is for Vegas area where VFR corridors connect GA airfields around the international airport
In this case, it looks like you’ll be under radar vector and I suggest you follow ATC instructions by the book 
Thank you for the explanation Vincent!
