CMF / CRF Details

CMF ID: 176

Install raised median with unmarked crosswalk (uncontrolled)


Prior Condition:  Unmarked crosswalk with no raised median at an uncontrolled pedestrian crossing.

Category: Pedestrians

Study: Safety Effects of Marked Versus Unmarked Crosswalks at Uncontrolled Locations: Executive Summary and Recommended Guidelines, Zegeer et al., 2002

Star Quality Rating:2 Stars  [View score details]
Rating Points Total:70
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.4
Crash Reduction Factor (CRF)
Value:39  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:40
Crash Type:Vehicle/pedestrian
Crash Severity:All
Roadway Types:Principal Arterial Other
Street Type:
Minimum Number of Lanes:3
Maximum Number of Lanes:8
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 and Suburban
Traffic Volume:Minimum of 15000 Average Daily Traffic (ADT)
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:1994 to 1998
Type of Methodology Used:Non-regression cross-section
Sample Size (crashes):9 crashes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009
Comments:The study design was a simple comparison of crash rates, controlling for pedestrian and traffic volume.