No, there is nothing dangling. I suggest a couple of other small changes: To estimate the vehicle crash rate for the current year, the crash rate from the previous year is used as a reference. The sentence does not itself exactly explain how this "reference" is used.
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farshidghBut "the crash rate" is not the subject for "estimate"?To estimate the vehicle crash rate for the current year, the crash rate from the previous year is used as a reference.
farshidghThank you fro your reply I agree with you about all you have mentioned. However, what is the subject of estimate? I think it is "he" (not mentioned because of passive voice), but from the sentence I say " the crash rate", so it is dangling because it is impossible that " the crash rate" estimates something (?). Is this argument wrong?I would appreciate if you cou