This CMF cannot be rated in the Clearinghouse because it appears in the 1st Edition of the Highway Safety Manual without an adjusted standard error. The Clearinghouse uses the adjusted standard error to provide a surrogate star quality rating for all CMFs that were imported from the HSM, so without this value, a star rating is not possible. In the HSM, there is a notation for these CMFs that "the standard error of the CMF is unknown". This is generally because the CMF was developed either through an expert panel or was obtained from a older study for which the standard error was unknown.