CMF / CRF Details

CMF ID: 9798

Install profiled thermoplastic pavement markings

Description: Profiled thermoplastic pavement markings consist of thermoplastic material with raised thermoplastic bumps creating a raised profile marking. These markings are designed to provide an improved level of vision to drivers, particularly during wet-road surface conditions. The profiled nature also provides a rumble effect for errant vehicles.

Prior Condition: flat-line thermoplastic or other standard markings

Category: Delineation

Study: Safety Evaluation of Profiled Thermoplastic Pavement Markings, Lyon et al., 2018

Star Quality Rating: 4 Stars   [View score details]
Rating Points Total: 130
Crash Modification Factor (CMF)
Value: 0.968
Adjusted Standard Error:
Unadjusted Standard Error: 0.027
Crash Reduction Factor (CRF)
Value: 3.2   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 2.7
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Street Type:
Minimum Number of Lanes: 2
Maximum Number of Lanes: 10
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather: Not specified
Road Division Type: All
Minimum Speed Limit: 25
Maximum Speed Limit: 70
Speed Unit: mph
Speed Limit Comment:
Area Type: Rural
Traffic Volume: Minimum of 120 to Maximum of 133762 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 8244 Annual Average Daily Traffic (AADT)
Time of Day: Not specified
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: 2005 to 2014
State: FL, SC
Country: USA
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 5438 crashes before, 1864 crashes after
Sample Size (miles): 849 miles before, 849 miles after
Sample Size (miles): 4697 mile-years before, 2137 mile-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Oct-27-2018