Basically an instant classic. The highways are my favorite. One suggestion, on the coastline, maybe add more of a port town? I get great performance on this map, easily hit 100 fps sometimes, so its very well optimized.
You DON'T need 8GB. I am uploading a test video for it (loading time and various settings) on my YT channel: THUNDERF430TV, momentarily, looks like a great map, I have 6GB with the exception of an i7-7700K CPU.
Nice. Could use some variety in landscapes, besides the cliffs and forests. Maybe a little desert area near SF would be nice. I also think a big city in the other side like NYC with skyscrapers would be a good addition.