CMF / CRF Details

CMF ID: 7789

Install raised median

Description:

Prior Condition: Roadways without raised medians

Category: Access management

Study: Validation and Application of Highway Safety Manual (Part D) in Florida, Abdel-Aty et al., 2014

 
Star Quality Rating: 2 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.81
Adjusted Standard Error:
Unadjusted Standard Error: 0.09
Crash Reduction Factor (CRF)
Value: 19   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 9
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes: >2
Road Division Type:
Speed Limit:
Area Type: Urban
Traffic Volume: Minimum of 1000 to Maximum of 158000 Annual Average Daily Traffic (AADT)
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: 2010 to 2012
Municipality:
State: FL
Country: USA
Type of Methodology Used: Regression cross-section
Sample Size (sites): 833 sites
Sample Size (site-years): 2499 site-years
Sample Size (miles): 526 miles
Sample Size (mile-years): 1578 mile-years
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-08-2016
Comments: Crashes at intersections and driveways are excluded for developing CMFs.