I think that you should have a start option (or add to the tutorial start) - an endless empty space with a working car, so you can practice driving. It would help players new to CATA driving who have to deal with figuring out the controls, low driving skill AND road obstacles. As a result of all of that, driving in CATA can be really hard to pick up.
The last time I was decent at it I savescummed like mad to practice, then when I came back to the game two months later I could barely turn. I realize driving is much easier in ASCII then on tiles (at least, I remember thinking this seemed true) … but something like the above, I would think, would be helpful.