CMF / CRF Details

CMF ID: 175

Install raised median with marked crosswalk (uncontrolled)


Prior Condition: Marked 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: 3 Stars   [View score details]
Rating Points Total: 90
Crash Modification Factor (CMF)
Value: 0.54
Adjusted Standard Error:
Unadjusted Standard Error: 0.1
Crash Reduction Factor (CRF)
Value: 46   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 10
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
State: AZ, CA, FL, KS, LA, MD, MA, MO, NC, OH, OR, PA, TX, UT, WA, WI
Country: USA
Type of Methodology Used: Non-regression cross-section
Sample Size (crashes): 111 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.