CMF / CRF Details

CMF ID: 2951

Install wide median (>2 m) on major road of a 4-leg signalized intersection (motorcycle crashes)

Description: Install a wide median (i.e. width greater than 2 meters) along the major road of a four-legged signalized intersection (effect on motorcycle crashes)

Prior Condition: No Prior Condition(s)

Category: Access management

Study: Applying Bayesian Hierarchical Models to Examine Motorcycle Crashes at Signalized Intersections, Haque et al., 2010

Star Quality Rating: 5 Stars   [View score details]
Rating Points Total: 135
Crash Modification Factor (CMF)
Value: 1.2
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: -20   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type: All
Crash Severity: All
Roadway Types: Not Specified
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather: Not specified
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type: Not specified
Intersection Geometry: 4-leg
Traffic Control: Signalized
Major Road Traffic Volume: Minimum of 5700 to Maximum of 37520 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume: Minimum of 2850 to Maximum of 31270 Annual Average Daily Traffic (AADT)
Average Major Road Volume : 18431 Annual Average Daily Traffic (AADT)
Average Minor Road Volume : 14509 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used: 2003 to 2006
Country: Singapore
Type of Methodology Used: Regression cross-section
Sample Size (crashes): 1948 crashes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-21-2011
Comments: Only motorcycle related crashes