Which resource contains an abundance of Crash Modification Factors (CMFs) for various roadway design scenarios?

The CMF Clearinghouse is the most comprehensive resource available for Crash Modification Factors (CMFs) related to various roadway design scenarios. It is specifically designed to collect, review, and disseminate data on CMFs, making it a central repository for researchers, practitioners, and policymakers. CMFs are essential for evaluating the potential safety impacts of different design decisions and interventions on roadways, and the Clearinghouse provides an extensive database that allows users to find specific CMFs based on various roadway features and conditions.

The CMF Clearinghouse offers detailed information, including the methodology used to develop CMFs, the contexts in which they apply, and the level of safety improvements expected from specific design changes. This focused collection of current data helps professionals make informed decisions to enhance roadway safety.

Other resources, while valuable in their own rights, do not offer the same breadth or specific emphasis on CMFs. For instance, the ITE Traffic Engineering Handbook covers broader traffic engineering principles but does not specialize solely in CMFs. The same applies to the AASHTO Manual on Geometric Design, which focuses on geometric design principles rather than the statistical relationships between roadway features and crash outcomes. The CMF Implementation and Use Guide is more about how to apply CMFs rather than serving