The map looks good, only slight problem is that the average FPS i get driving around a normal BeamNG map is about 80, on this map, it goes an average of 15fps, with lowest settings goes 30 fps.
It seems that the shadows of the map are the cause of this huge lag, i would opt to not put every tree and every little rock to have "shadows" on "partial" settings of the shadow on graphics.
thats what causing the huge lag for many people.