Those are the reasons it is not recommended to drive alone. We all do what we have to do, but the other set of hands can be (not to be dramatic) life or death. Keep your cell phone on YOU (not in the cart), wear a helmet and gloves, carry a knife, keep the whip in your hand. The ADS, etc., do not make this stuff up to make us miserable.
The horse in my avatar got her leg over the shaft of the carriage when it dipped into a ditch that was covered in grass. If I had not had another person on the carriage, I could not have gotten her out of the harness. When Biothane is under pressure, it is nearly impossible to undo. We cut her out with his knife.
My good friend was driving alone with her QH, mister nothing-phases-me, and the carriage hit a small log she did not see. It caught her off guard, and pithed her out of the carriage, and she would have bled to death from the compound fracture in her leg if she had not had her phone on her. The horse stopped and stood there.