U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
The CMF for left shoulder width is calculated as (HSM equation 19-36, p.19-49):
The crash modification factor for left shoulder width on a site of type w, cross section x, crash type y, and severity z equals the exponential of the product of the paved left shoulder width minus 8 and a. (HSM Table 19-27, p.19-49)
The crash modification factor for left shoulder width on a C-D road, one lane, multi-vehicle, and fatal and injury severity equals the exponential of the product of 7 minus 4 and -0.0539.
The crash modification factor for left shoulder width on a C-D road, one lane, multi-vehicle, and fatal and injury severity equals 0.851.
The crash modification factor for left shoulder width on a C-D road, one lane, multi-vehicle, and property damage only severity equals the exponential of the product of 7 minus 4 and -0.0259.
The crash modification factor for left shoulder width on a C-D road, one lane, multi-vehicle, and property damage only severity equals 0.925.
The crash modification factor for left shoulder width on a C-D road, one lane, single-vehicle, and fatal and injury severity equals the exponential of the product of 7 minus 4 and -0.0539.
The crash modification factor for left shoulder width on a C-D road, one lane, single-vehicle, and fatal and injury severity equals 0.851.
The crash modification factor for left shoulder width on a C-D road, one lane, single-vehicle, and property damage only severity equals the exponential of the product of 7 minus 4 and -0.0259.
The crash modification factor for left shoulder width on a C-D road, one lane, single-vehicle, and property damage only severity equals 0.925.
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