Really lovely map! I love the scenery, the length and the attention to detal as well as the nice layout of the road! Though i have some suggestions that could be added to make it even better!
-rest stops are very commonly distributed on german highways. On those 30 something Kilometers woul you have found at least 2-3 irl. it would also give the opptertunity for more realistic screenshots as well as roleplay wich is a nice thing to have. They can be just like a little strp of asphalt next to the highway or even a gas station. Having a mix of both would be really cool!
-Coming from westbound to eastbound, the eastbound side just generally has more stuff in it (bridges, the castle, wind turbines etc) a few more decorations on the other side of the map wouldnt hurt
-the map could be just a little wider, you can kinda tell how narrow it is at some point. Making it just a few 10 meters wider would make it way more immersive
-this is not at all a needed addition but could really work in this. One or two small Villages along the highway! They dont really have to be large maybe just 10-20 houses but it would make the map feel so much more alive than it already is. On that note maybe some blocked off offramps to make it really seem like this is a well traveled part of the highway system ^^
It's look great! (and surprisingly run well even on minimum graphics) And now I can use this map to calculate my fuel consumption on various routes I've traveled. (Even the map is based on Germany and really go straight away but... anyways)