I looked at the image before reading the rest of your comment. My first thought was that the tire tracks crossing each other was supposed to indicate a full rotation of the car. (It’s really slippery, you might spin out!)

After reading your comment I still don’t think one of the lines is a road’s edge?

Do you know if either interpretation is the official one?

EDIT: Just took another look and I see it now. The line near the car’s left tire doesn’t actually align with that tire!