CMF / CRF Details

CMF ID: 6938

Flatten side slopes

Description:

Prior Condition: Traversable median with unspecific sideslope ratio

Category: Roadside

Study: NCHRP Report 794: Median Cross-Section Design for Rural Divided Highways, Graham et al., 2014

 
Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 90
Crash Modification Factor (CMF)
Value: 1.065
Adjusted Standard Error:
Unadjusted Standard Error: 0.028
Crash Reduction Factor (CRF)
Value: -6.5   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 2.8
Applicability
Crash Type: Other
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes: 4
Road Division Type: Divided by Median
Speed Limit:
Area Type: Rural
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:
State: MO
Country: USA
Type of Methodology Used: 7
Sample Size (miles): 301 miles
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-01-2015
Comments: This CMF applies to a unit decrease in median slope ratio for other median-related crashes on four-lane non-freeways with a traversable median.