If a CMF equals 1, what does that imply about crashes after implementing the countermeasure?

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Study for the Road Safety Professional Level 1 Exam. Enhance your knowledge with multiple-choice questions and explanations. Prepare effectively and succeed!

Multiple Choice

If a CMF equals 1, what does that imply about crashes after implementing the countermeasure?

Explanation:
The main idea is how a Crash Modification Factor (CMF) expresses the change in crash frequency after applying a countermeasure. A CMF of 1 means the number of crashes after implementing the countermeasure is the same as before—no change. So, crashes stay the same, and there’s no improvement or harm in crash counts under the tested conditions. If the CMF were less than 1, crashes would reduce; if it were greater than 1, crashes would increase. In this question, that corresponds to no change in crashes being the correct interpretation.

The main idea is how a Crash Modification Factor (CMF) expresses the change in crash frequency after applying a countermeasure. A CMF of 1 means the number of crashes after implementing the countermeasure is the same as before—no change. So, crashes stay the same, and there’s no improvement or harm in crash counts under the tested conditions. If the CMF were less than 1, crashes would reduce; if it were greater than 1, crashes would increase. In this question, that corresponds to no change in crashes being the correct interpretation.

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