CMF / CRF Details

CMF ID: 2838

Widen left shoulder by 1 foot

Description: Widen left shoulder by 1 foot

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: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.925
Adjusted Standard Error:
Unadjusted Standard Error: 0.04
Crash Reduction Factor (CRF)
Value: 8   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 3.6
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not Specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type:
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
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.