To be Honest,as you talked about "self-driving race car",the ai needs to be fixed in single player,that there ai are way too aggressive and not leaving the space most of the time when player are going coming to lap them or overtake them,usually i use single player for practicing,but i gave up due to ai always try to rearend me when i braked a little bit too early,and it's hard to find racing server on server list,most of them are drift and cruise server