CMF / CRF Details

CMF ID: 176

Install raised median with unmarked crosswalk (uncontrolled)

Description:

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]
Crash Modification Factor (CMF)
Value: 0.61
Adjusted Standard Error: 2.02
Unadjusted Standard Error: 0.4
Crash Reduction Factor (CRF)
Value: 39   (This value indicates a decrease in crashes)
Adjusted Standard Error: 202
Unadjusted Standard Error: 40
Applicability
Crash Type: Vehicle/pedestrian
Crash Severity: All
Roadway Types: Principal Arterial Other
Number of Lanes: 3 to 8
Road Division Type:
Speed Limit:
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
Municipality:
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): 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.