Mamma mia! Why distress so much by "D" car on a straight road? Why encourage "D" car cut-in? Ridiculous. At the bend "备刹" and "减速" are expected by "B" and "C" car driver, though. The best way to avoid an accident is never do anything unexpected. Stressful and dangerous driving techniques. The host needs to attend a Westerner's "Defensive Driving" course.