CMF / CRF Details
CMF ID: 2467
Resurface pavement with open-graded asphalt concrete (OGAC)
Description: Resurface with open-graded asphalt concrete (OGAC)
Prior Condition: No Prior Condition(s)
Category: Roadway
Study: Safety Performance of Experimental Pavement Types in California Using Before-and-After Comparisons, Oh, ragland, and Chan, 2010
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 40 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.59 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.16 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 41 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 16 |
| Applicability | |
|---|---|
| Crash Type: | Wet road |
| 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: | Wet road |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | All |
| Traffic Volume: | |
| 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: | 1994 to 2005 |
| Municipality: | |
| State: | CA |
| Country: | |
| Type of Methodology Used: | Simple before/after |
| Sample Size (crashes): | 42 crashes after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 01, 1970 |
| Comments: | |
