Finally, the Autobahn Rebuilding Project has its own topic. And I'm quite positive towards your plan as it seem well thought out, but of course, I have some notes to make
It might not always be easy to weight which cities to include. Sometimes, I could not really understand your choice of new cities when you mentioned them in the old topic. Having seen this draft, I do get the reasons behind it much better. It seems like you want to rebuild the most sensible road network - I think, your plans reflect that very well! - and go for the cities along the way and nearby the nodes. Sometimes that means not always choosing the city I'd consider the most important ones. This applies to Karlsruhe, Würzburg and Ulm, which I don't know much about and thus wouldn't consider to be that important. Looking at this plan, however, Würzburg might be a sensible choice. I'm not yet sure about Karlsruhe and Ulm. I think, every city should have something distinct - the selection of cities should be interesting and representative, and I don't know if that's easy to achieve with those three cities. With that being said, I don't see any serious flaws in your concept, however - no matter if you implement to my suggestions or not.
In the old topic I supported Augsburg over Ulm - this might still be an option without changing your road network, Ulm could then be a scenery city. Also, keep it balanced - looking at this plan, the South would have nine cities, whereas Eastern Germany had no more than seven. Compared to your plans in Bavaria, also Lower Saxony does not have that much of cities considering how large it is. I think, this is at the edge of balancing, and I wouldn't include more than nine cities for Southern Germany. If you want to include more cities in Eastern Germany apart from those mentioned in the plan, I would prefer Halle at first place and then Schwerin (no more than these two). And still I think, Wiesbaden/Mainz should be considered even though might be hard to make (double-capital, at both sides of the Main river, large cities). I know, I said it before, but I want to have it re-said
To put a long statement in short: The road network looks very well-conceived (only thing I've spotted is that there should be an Autobahn between Dresden and Chemnitz) - still, there might be considerations towards the cities at some places. Don't always go for the easiest choice. Even with your current plans, it looks well-made, though.
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A note about something that I really like: Your plans to include Rügen island and Plzen! I found the latter one was really missing in vanilla game from the start! Also, I appreciate your plans to include more Dutch cities.