There was an accident at the crossroads this morning. This is correct. I wouldn't use 'in', it sounds bad.

One note: I live in the rural American south, and here we still use "crossroads" quite often. "Intersections" are found in towns, and are very busy. "Crossroads" are surrounded by cornfields, and have far less traffic.

Thank you, guys !!!! It was useful. :)))

A 'crossroad' in British English is where two roads cross over each other. If we imagine a cross, it would have four arms. It is not uncommon but the most common all-purpose word to describe where two roads meet is 'junction.' A 'crossroad' is a type of junction. There are other kinds of course, such as 'T-junctions.' 'Intersection' is understood but rarely used in colloquial speech, it's seen as more of an Americanism.

Okay. First, at least in American English, we'd be MUCH more likely to use "intersection" than "crossroads." Outside of old blues songs (who doesn't love Robert Johnson!) I've never heard an American say "crossroads" in this context. It's not incorrect, it would just be unusual. Perhaps "crossroads" is more commonly used in British English (can any Brits comment on that?). With that out of the way, if I were to use "crossroads", I would say "There was an accident at the crossroads this morning." I can't identify why, but "an accident in the crossroads" sounds terribly unnatural to my ear. I Using "intersection" instead, I think it becomes a bit tricky. If the accident occurred right in the middle of the intersection, then I would likely say "there was an accident in the intersection this morning." Otherwise I would probably say "there was an accident at the intersection." I think this would be pretty fine distinction, though, and I don't think that either word choice sounds unnatural.