Helpful for race track maps and circuits, so that the AI can be set to follow a certain path (not like manual where it stops) but map makers can create circuits that AI race around, so that on maps like Hirochi Raceway it could go multiple ways without having to put up with the Random AI being... well... random.
Already can be done using scenearios. AI cant drive for shit though so until then this is pretty pointless.
I think it is still worth adding. Scenarios have downsides like being unable to spawn other cars etc. Btw, I just made a thread about improving the Navigation App.
