CMF / CRF Details

CMF ID: 2837

Gravel right shoulder

Description: Gravel right shoulder compared to no right shoulder, earth, or paved right shoulder.

Prior Condition: No Prior Condition(s)

Category: Shoulder treatments

Study: An Assessment of Traffic Safety in Urban Deer Herd Management Zones in Iowa, Gkritza et al., 2010

Star Quality Rating: 2 Stars   [View score details]
Rating Points Total: 70
Crash Modification Factor (CMF)
Value: 0.517
Adjusted Standard Error:
Unadjusted Standard Error: 0.11
Crash Reduction Factor (CRF)
Value: 48   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 11.3
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not Specified
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Number of Lanes Comment:
Crash Weather: Not specified
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If countermeasure is intersection-based
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Development Details
Date Range of Data Used: 2002 to 2007
Municipality: Dubuque, Cedar Rapids, Iowa City
State: IA
Country: USA
Type of Methodology Used: Regression cross-section
Sample Size (crashes): 117 crashes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-21-2011
Comments: For deer-related injury crash in urban deer management zones.