Part D of the HSM presents information regarding the effects of various safety treatments or countermeasures. This information is intended to estimate how effective a particular countermeasure or set of countermeasures will be in reducing crashes at a specific location in the form of a CMF. Most of the information in Part D of the HSM manual is now located on the CMF Clearinghouse website. It is anticipated that, with the publication of the HSM2, Part D will focus on the methodologies for selecting, applying, and developing CMFs and will no longer list individual CMFs. The CMF Clearinghouse website will become the sole repository of CMFs.