hi, I was wondering if a map could be randomly generated by a system added to the game so each time you could spawn a new map [but only for good computers]
I can't speak for BeamNG here, but I would imagine that it is something of a pipe dream to them...they've probably pondered this idea at one point, but they have an incredible amount of work to take care of still. There's way more issues that need to be taken care of first before even thinking about implementing something such as randomly generating terrain. Of course, you could do it yourself...
Random terrains are easy to generate in a program like L3DT, but the result is rarely interesting to drive. If something like that was integrated in BeamNG, it would likely be just variations of similar bumpy hills. Terrain types, trees and grass would be relatively easy to add so they match the terrain. Roads and other features, not so easy. In my opinion, handmade maps are always more interesting, maybe combined with generation so every detail does not need to be sculpted by hand.