Split between good and not is imprecise. Grassy bed makes it hard to see exactly what ur driving on but generally fine. A beater 2wd can probably make it. In the last km or so a couple ditches that would necessitate a crossover. Otherwise drive slow and make sure you see where the road dips, etc and less capable vehicles should still make it.

Beyond end of marked road is another maybe 750m of road with large washouts/water bars. Excellent angles and probably 4wd needed to get to the end of theoretically driveable terrain.