CMF / CRF Details

CMF ID: 9147

Install parallelogram-shaped pavement markings on approaches to unsignalized pedestrian crosswalks

Description: Install parallelogram-shaped pavement markings approaches to pedestrian crosswalks to provide optical illusion to drivers approaching pedestrian crosswalks.

Prior Condition:  No Prior Condition(s)

Category: Pedestrians

Study: Effects of parallelogram-shaped pavement markings on vehicle speed and safety of pedestrian crosswalks on urban roads in China, Guo et al., 2016

Star Quality Rating:3 Stars  [View score details]
Rating Points Total:85
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.053
Crash Reduction Factor (CRF)
Value:21.1  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:5.29
Crash Type:Vehicle/pedestrian
Crash Severity:All
Roadway Types:Not specified
Street Type:
Minimum Number of Lanes:3
Maximum Number of Lanes:3
Number of Lanes Direction:One Direction
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:Divided by Median
Minimum Speed Limit:60
Maximum Speed Limit:60
Speed Unit:km/h
Speed Limit Comment:
Area Type:Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:Roadway/pedestrian crossing (eg, midblock crossing)
Intersection Geometry:
Traffic Control:Not specified
Major Road Traffic Volume:Minimum of 6989 to Maximum of 27035 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:
Average Major Road Volume :11318 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :
Development Details
Date Range of Data Used:2008 to 2013
Type of Methodology Used:Regression cross-section
Sample Size (crashes):177 crashes
Sample Size (sites):12 sites
Sample Size (site-years):72 site-years
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jan 17, 2018