If you’ve been around the nation long enough, you will notice a yellow triangular sign with the picture of a car running into a truck. (I did it once and it felt downright horrible… no injuries, though…) This sign is supposed to warn you of a so-called “accident black spot”.
Except for that nobody in the western world really calls it an “accident black spot”. I was in touch with folks on the wrong end of the Pacific, and they said that they call that kind of road either a “hazardous road” or a “treacherous road”.
“Dangerous road” or “dangerous section” might also do well. Of course, that’s referring to the Chinese term 事故多发 — or “accidents happen often” (verbatim translation).
So — drive carefully!