No, that is not correct. accidents occurred at... You could put a comma after "course" and then use the participle.
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EnglishmavenYour use of "while driving under free-flow..." is not correct because you are saying that the accidents were driving, and accidents can't drive.What about this one? Is the following sentence OK?
gillyflowerIs the following sentence OK?No. You are trying to pack too much into one sentence.