CMF / CRF Details

CMF ID: 5232

Presence of an elevated road above intersection

Description: Intersection location is below an elevated roadway

Prior Condition: No Prior Condition(s)

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: 1.58
Adjusted Standard Error:
Unadjusted Standard Error: 0.32
Crash Reduction Factor (CRF)
Value: -58   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 31.9
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
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: 7
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 volumes are actually total entering traffic