A little confused here about using airways and the confluence of airways...
I'm guessing my question would be best illustrated with an example:
In the Chicago area....
If you wanted to fly from the Joliet VOR (JOT - Just at the SW edge of the Chicago Class B Airspace) on airway V8 eastbound to the Chicago Heights VOR (CGT - Juat at the SE edge of the Chicago Class B Airspace) and then turn North onto airway V7-92 V97-422 and take that all the way North along Lake Michigan, past where it becomes just V7...how would you file for that?
I understand that when there is a confluence of airways...they are written serially (i.e. V7-92), but why are they written on separate 'lines' sometimes...such as:
Does that mean that the above segment is the 'confluence' of airways V7 and V92....and V97 and V422?
If you were to be flying along that segment....would you file that you are using airway V7-92 V97-422....or....do you simply use one of the 'airway' names that are part of the confluence...i.e....just V7?
Are you even allowed to do that....meaning....turn from V8 west to the CGT VOR to airway V7-92 V97-422? Or do you have to already be on an airway that is listed as part of the confluence in order to turn onto the segment with the confluence (i.e....you have to be on airway V7, 92, 97, or 422 in order to use the segment with the confluence of V7-92 V97-422)? So in other words, because I was on airway V8...would I not be able to turn North onto V7-92 V97-422 because V8 isn't listed as part of the confluence?
Next question...a little simpler:
West of the Chicago Class B Airspace is airway V6 which leads up to the Dupage VOR (DPA - On the western edge of the Chicago Class B Airspace) and seems to 'end' there.
However, airway V6-10 seems to continue east away from the Chicago Class B airspace from the Southeast portion of the Class B airspace.
There is a 40 some-odd NM gap between where airway V6 ends west of the airspace and continues again SE of the airspace?
How does that work? Does ATC vector you from where the airway ends in one place, and begins again in another? How do you get from where the airway ends, across the gap, to where it begins again?