CMF / CRF Details

CMF ID: 8109

Upgrade existing markings to wet-reflective pavement markings

Description: This strategy involves upgrading existing markings from standard marking materials to wet-reflective markings applied as paint, tape, or thermoplastic material.

Prior Condition: Standard pavement markings

Category: Delineation

Study: Safety Evaluation of Wet Reflective Pavement Markers, Lyon et al., 2015

Star Quality Rating: 4 Stars   [View score details]
Rating Points Total: 130
Crash Modification Factor (CMF)
Value: 0.825
Adjusted Standard Error:
Unadjusted Standard Error: 0.051
Crash Reduction Factor (CRF)
Value: 17.5   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 5.1
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Street Type:
Minimum Number of Lanes: 3
Maximum Number of Lanes:
Number of Lanes Direction: Both Directions
Number of Lanes Comment: Multi Lane
Crash Weather: Not specified
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:
Traffic Volume: Minimum of 1353 to Maximum of 25381 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 7274 Annual Average Daily Traffic (AADT)
Time of Day:
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: 2003 to 2012
State: WI
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 460 crashes after
Sample Size (miles): 121 miles before, 121 miles after
Sample Size (miles): 551 mile-years before, 226 mile-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-10-2016
Comments: CMF does not include intersection-related, animal-related, or snow/slush/ice crashes in the total crashes addressed.