CMF Clearinghouse


Winter 2016

The winter 2016 edition of CMF Update is the 14th edition of the CMF Clearinghouse e-newsletter. To subscribe, please visit To view archived issues, please visit

In this issue:

Upcoming FHWA Webinar Notice

Seeing the Value: Using CMFs to Calculate the Benefits of Safety Improvements
Tuesday, December 6, 2016
2:00-3:30pm Eastern Time

Register here

Join transportation engineers, designers, and planners from across the country to learn about the most recent updates to the Federal Highway Administration's (FHWA's) CMF Clearinghouse, how two states are using CMFs to estimate the benefits of safety improvements, and how your state can develop a state CMF list.

Do you have questions about applying CMFs? Be sure to stay for the end of the session for a brief Q&A session.

Continuing education: Attendees will be eligible to receive a certificate of completion for 1.5 hours that can be applied toward Professional Development Hours (PDH) credit, per state requirements. This event will also be submitted for American Institute of Certified Planners (AICP) credits.

Questions? Contact Daniel Carter at or Karen Scurry at for more information.

Featured CMFs

The CMF Clearinghouse recently reached a new milestone – there are now more than 5,000 star-rated CMFs in the database! Below are some CMFs that were added recently.

Install a traffic signal and left turn lanes
Crash Modification Factor (CMF) Value: 0.541
Star Quality Rating: Description: 4 Stars

Install a shoulder rumble stripe, widen shoulder from 0 to 2 feet, and pavement resurfacing
Crash Modification Factor (CMF) Value: 0.822
Star Quality Rating: Description: 3 Stars

Upgrade existing markings to wet-reflective pavement markings
Crash Modification Factor (CMF) Value: 0.825
Star Quality Rating: Description: 4 Stars

Featured Resource

Scale and Scope of Safety Assessment Methods in the Project Development Process

The purpose of this informational guide is to assist state and local agencies in identifying and applying suitable methods to quantitatively assess the safety performance impacts of project development decisions. The guide suggests assessment methods that may be suitable for answering safety performance-related questions that typically arise during each phase of the development process and for projects of various types. It also provides examples that illustrate the thought process for selecting a safety assessment method. This information on safety performance can then be considered in concert with other project criteria to make more informed highway investment decisions.

To view the guide, visit

Featured FAQ

How do I choose between CMFs in my search results that have the same star rating but different CMF values?

It's true that two or more CMFs for a particular countermeasure may have the same star rating but differing CMF values. It will be necessary for you to examine the information related to the applicability of the CMFs to determine how they differ. This could involve examining the brief data shown on the search results page (i.e., crash type, crash severity, roadway type, and area type) or looking at all the information about the CMFs by viewing the CMF details page for each one. In some cases, you may also need to review the original study to better understand the applicability of a particular CMF.

For more on this question, visit

Submit a Study

The CMF Clearinghouse welcomes CMF study submissions to be included in its searchable database. Please use the provided form at to submit your study. Be sure to search the Clearinghouse before submitting a new CMF as we may already have it listed. You may either submit a link to a resource already existing on the web (preferred) or upload your own file. Submissions might include published research studies that are not presented in the Clearinghouse, or state-specific CMFs that were developed as part of the Highway Safety Improvement Program.