So, upon michih's recommendation, I looked at this book regarding Autobahnen in Austria:
https://www.asfinag.at/media/1510/de_buch-30-jahre-asfinag.pdfI've only been to Austria once, back in 1978, traveling from the Liechtenstein border (near Feldkirch) to Innsbruck, and then up to the (then West) German border near Garmisch-Partenkirchen.
The referenced book gives rise, for me, to one question about each of A12 and A14, the only two autobahns in the area of my travels, and other research leads me to another question about what is (or was) in between the two. The A12 question might be a new waypoint request.
A12:
The book makes it fairly clear that the sections of A12 built before 1978 were all east of Dirschenbach. The section from the Zirl Ost interchange to Dirschenbach (basically, the Zirl Bypass section) appears to have been opened in late 1976. The catch is, there is no longer an interchange near Dirschenbach! That appears to have been a temporary interchange that was eliminated when the Dirschenbach-to-Lengenberg sections were completed... but those didn't open until at least December of 1978, so I conclude that our July 1978 tour bus most likely got on A12 at its then-current west end near Dirschenbach... where there isn't a waypoint.
If we were to add a waypoint here connecting A12 and B171, what would we call it? *94 and *A12(94) (my estimate of the nearest whole kilometer)? Or something else?
A14:
The book appears to state that the very first AND very *last* sections completed were around Bludenz. The earlier one is marked "(rechte RFB)" and the later one marked "(linke RFB)". Right and left RFB? What does RFB mean? And if only the "right" RFB was complete in 1978, did that carry only westbound traffic, only eastbound traffic, both, or no traffic at all until the "left" RFB was also complete?
In between:
Today, S16 connects the east end of A14 with the west end of A12. Most of S16 wasn't there in 1978; from what I've been able to gather, only the westernmost 8 kilometers were complete then (interchanges 53 to 61 inclusive). Most of the old route parallel to S16 isn't in the HB -- specifically L97, L197, and L68... but other Austrian L routes *are* in the HB, including a couple that I traveled on. What is the criteria for including or excluding an L route?