CMF / CRF Details
CMF ID: 2258
Improve pavement friction (increase skid resistance)
Description:
Prior Condition: Increase pavement friction on curves from a SCRIM value of less than 50 to a SCRIM value greater than 60.
Category: Roadway
Study: Effects of pavement friction improvements on crash rates on Spanish two-lane rural roads, Mayora and Pina, 2008
Star Quality Rating: | [View score details] |
Rating Points Total: | 85 |
Crash Modification Factor (CMF) | |
---|---|
Value: | 0.52 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.02 |
Crash Reduction Factor (CRF) | |
---|---|
Value: | 47.7 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 1.97 |
Applicability | |
---|---|
Crash Type: | Wet road |
Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible injury) |
Roadway Types: | Not Specified |
Street Type: | |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 2 |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | Wet road |
Road Division Type: | Undivided |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Rural |
Traffic Volume: | Minimum of 403 to Maximum of 36372 |
Average Traffic Volume: | |
Time of Day: | All |
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: | 1993 to 2002 |
Municipality: | Central and Western Spain |
State: | notusa |
Country: | |
Type of Methodology Used: | Simple before/after |
Sample Size (crashes): | 96 crashes before, 79 crashes after |
Other Details | |
---|---|
Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Jan 01, 1970 |
Comments: |