CMF / CRF Details

CMF ID: 5233

Presence of three leg intersection vs. four leg intersection


Prior Condition: Four-leg intersection

Category: Intersection geometry

Study: Corridor-level signalized intersection safety analysis in Shanghai, China using Bayesian hierarchal models, Kun Xie, Xuesong Wang, Helai Huang, Xiahong Chen, 2013

Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 80
Crash Modification Factor (CMF)
Value: 0.75
Adjusted Standard Error:
Unadjusted Standard Error: 0.13
Crash Reduction Factor (CRF)
Value: 25   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 12.8
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:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day: Not specified
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: 3-leg,4-leg
Traffic Control: Signalized
Major Road Traffic Volume: Minimum of 7700 to Maximum of 140300 Average Daily Traffic (ADT)
Minor Road Traffic Volume:
Average Major Road Volume : 46200 Average Daily Traffic (ADT)
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2009 to 2009
Country: China
Type of Methodology Used: Regression cross-section
Sample Size (site-years): 195 site-years
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-02-2013
Comments: Major Road ADT is total entering vehicles for the intersection