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]
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
Number of Lanes:
Road Division Type:
Speed Limit:
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: