CMF / CRF Details

CMF ID: 3070

Install transverse rumble strips at pedestrian crosswalks on rural low-volume roads


Prior Condition:  without transverse rumble strips

Category: Roadway

Study: Effects of Transverse Rumble Strips on Safety of Pedestrian Crosswalks on Rural Low-Volume Roads in China, Liu et al., 2011

Star Quality Rating:2 Stars  [View score details]
Rating Points Total:60
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.33
Crash Reduction Factor (CRF)
Value:24  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:33
Crash Type:All
Crash Severity:All
Roadway Types:Not Specified
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:40
Maximum Speed Limit:80
Speed Unit:km/h
Speed Limit Comment:
Area Type:Rural
Traffic Volume:
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:2007 to 2009
Municipality:Yangjiang, Guangdong
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):15 crashes before, 6 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jul 15, 2011