Calling All Photographic Forensic Experts (Or Guessers)

FOX 4 Photojournalist @kdfw015 Nune Tarango shot this pic in FW..kids on bus said been there more than 1/2 hr @FOX4 pic.twitter.com/s4jsdVYPLR
— Brandon Todd (@BrandonToddFOX4) February 6, 2014

Based upon the tire tracks, did that bus do a 180? Or did it just slide back down the hill (like it appears Mr. Fed Ex did)?