CMF / CRF Details

CMF ID: 1516

Create directional median openings to allow left-turns and u-turns


Prior Condition: No Prior Condition(s)

Category: Access management

Study: Signalized Intersections: Informational Guide, Rodegerdts et al., 2004

Star Quality Rating: 2 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.49
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 51   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type:
Traffic Volume:
Average Traffic Volume:
Time of Day:
If countermeasure is intersection-based
Intersection Type: Other
Intersection Geometry:
Traffic Control: Uncontrolled
Major Road Traffic Volume: Minimum of 14319 to Maximum of 28154
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:
State: MI
Type of Methodology Used: Non-regression cross-section
Sample Size (sites): 51 sites
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009