CMF / CRF Details

CMF ID: 8321

increase intersection illuminance from low (< 0.2 fc) to medium (≥ 0.2 fc and <1.1 fc)

Description: Increase intersection illuminance 13 from low (< 0.2 fc) to medium (≥ 0.2 fc and <1.1 fc)

Prior Condition:  Signalized intersections with lower illuminance (<0.2 fc)

Category: Highway lighting

Study: Safety Effects of Street Illuminance at Urban Signalized Intersections in Florida, Wei et al., 2016

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:75
Crash Modification Factor (CMF)
Value:0.48
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:52  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:Nighttime
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:Night
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:4-leg
Traffic Control:Signalized
Major Road Traffic Volume:Minimum of 5167 to Maximum of 67508 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 1300 to Maximum of 56387 Annual Average Daily Traffic (AADT)
Average Major Road Volume :29733 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :12457 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:2010 to 2013
Municipality:Tampa
State:FL
Country:
Type of Methodology Used:Regression cross-section
Sample Size (crashes):1234 crashes
Sample Size (sites):91 sites
Sample Size (site-years):364 site-years
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jan 17, 2017
Comments: