Very good for a 0.3! I already read that you plan to improve the surface, that's the most important improvement for me, as the track surface feels way too smooth right now (tested with McLaren P1 GTR).
Fantastic track! Will you add some skidmarks in the future? I see a darker areon the asphalt but no single skidmarks. The physical roadmesh can be quite bumpy at times but perhaps the track is bumpy in real life?