Well, nearly everything, since pretty much every vanilla vehicle with a fuel tank (bar the T-Series) lacks a fuel filler cap for some reason.Being an out-and-out simulator, the developers do nearly everything to prevent this trope from going into play. 0.17's traffic cars are relatively competent at following between the lines, signaling, and-as of the latest update-stopping at stoplights in East Coast USA, but they're not perfect, which winds up adding a bit of realism.
It also averts Lemming Cops to some degree cars chasing you at higher speeds tend to brake and back off to try and nudge you off the road rather than ramming you in full force. Part of their tendency to crash is not knowing about the presence of obstacles, so while it might be okay to slide off the road a little bit, it's not as okay when there are big trees lining the side of the road. If AI-driven cars don't crash, they're actually very adept with turning speeds and the cornering ability of their vehicles (provided the map's routes are laid out correctly).
Amphibious Automobile: More like Submarine Automobile-in the earliest versions, cars were able to work underwater.There used to be a beater Ibishu Covet with a blown headgasket, broken shocks, worn tires, and a dirty, rusty body.The parts actually fall off so quickly that it is hard to complete the challenge (which takes about 4 minutes) without everything falling off before the truck reaches the finish. One scenario has you driving a cement mixer that not only likes to tip over in corners, but also loses parts as you drive it.The stanced Ibishu Pessima has virtually no ride height and crappy handling.The Alleged Car: The Ibishu Pigeon is a 3-wheeler with a tiny 27-horsepower engine and crippling instability in sharp turns (even with stabilizers attached).