CMF / CRF Details

CMF ID: 9015

Install raised median with or without marked crosswalk (uncontrolled)

Description:

Prior Condition: No median

Category: Pedestrians

Study: Development of Crash Modification Factors for Uncontrolled Pedestrian Crossing Treatments, Zegeer et al., 2017

 
Star Quality Rating: 4 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.741
Adjusted Standard Error:
Unadjusted Standard Error: 0.093
Crash Reduction Factor (CRF)
Value: 25.9   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 9.3
Applicability
Crash Type: Rear end,Sideswipe
Crash Severity: All
Roadway Types: Minor Arterial
Number of Lanes: 2 to 8
Road Division Type: Divided by Median
Speed Limit:
Area Type: Urban and suburban
Traffic Volume: Minimum of 1245 to Maximum of 46000 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 12599 Annual Average Daily Traffic (AADT)
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: 2004 to 2013
Municipality:
State: AZ, FL, IL, MA, NY, NC, OR, VA, WI
Country: USA
Type of Methodology Used: Regression cross-section
Sample Size (crashes): 4444 crashes
Sample Size (site-years): 5021 site-years
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-17-2017
Comments: Study sites were a combination of intersection and mid-block locations.