Establishing crash modification factors and their use.

Gayah, Vikash V.; Donnell, Eric T.; Thomas D. Larson Pennsylvania Transportation Institute

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Establishing crash modification factors and their use.

2014-08-01
By Gayah, Vikash V. ; Donnell, Eric T.

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English

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Details:

Creators:

Gayah, Vikash V. ; Donnell, Eric T.

Gayah, Vikash V. ; Donnell, Eric T. Less -
Corporate Creators:

Thomas D. Larson Pennsylvania Transportation Institute
Corporate Contributors:

United States. Federal Highway Administration ; Pennsylvania. Dept. of Transportation. Bureau of Planning and Research

United States. Federal Highway Administration ; Pennsylvania. Dept. of Transportation. Bureau of Planning and Research Less -
Subject/TRT Terms:

[+]

Countermeasures Highway Safety Implementation Traffic Accidents Training
Publication/ Report Number:

FHWA-PA-2014-005-PSU WO 6 ; LTI 2015-02

FHWA-PA-2014-005-PSU WO 6 ; LTI 2015-02 Less -
Resource Type:

Tech Report
Geographical Coverage:

Pennsylvania
Corporate Publisher:

Mid-Atlantic Universities Transportation Center
Abstract:

A critical component in the Association of State Highway and Transportation Officials’ (AASHTO) Highway Safety Manual

(HSM) safety management process is the Crash Modification Factor (CMF). It is used to estimate the change in the

expected (average) number of crashes at a site when a specific countermeasure is implemented. This project responds to a

request from the Pennsylvania Department of Transportation (PennDOT) to help integrate the use of CMFs into the existing

safety management process. The objectives of this project were to assemble a list of CMFs that are consistent with the HSM

and are appropriate for use in Pennsylvania, and provide guidelines for their use. Two products were created to help

achieve these objectives. The first product is a guidebook that describes the proper implementation procedures for CMFs

and contains a complete list of CMFs that are appropriate for use in Pennsylvania. This guidebook is the Pennsylvania CMF

Guide. The second product is a training presentation for PennDOT entitled What are CMFs and how do you use them? This

presentation will be used to introduce engineers to CMFs, describe how to implement them, and provide guidance for how to

use the Pennsylvania CMF Guide. This presentation is geared toward both internal and external training workshops.

The remainder of this report provides details on the development of these two products, which are included as appendices.
Format:

PDF
Funding:

4400008014, PSU 006
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:c72145af7dac973b307317f4b2dd599c87cceb7426f3f8e4960e6d9738877dd8
Download URL:

https://rosap.ntl.bts.gov/view/dot/27858/dot_27858_DS1.pdf
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Establishing crash modification factors and their use.

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