CMF / CRF Details
Change negative vertical grade from G1 to G2
Countermeasure ID: 7564
Description: Change negative vertical grade from G1 to G2 in percent.
Prior Condition: No Prior Condition(s)
Category: Alignment
Study: Development of Crash Modification Factors of Alignment Elements and Safety Countermeasures for Korean Freeways, Choi et al., 2015
| Crash Modification Factor (CMF) |
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| Value: |  |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) |
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| Value: |  |
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| Unadjusted Standard Error: | |
| Applicability |
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| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | |
| Traffic Volume: | Minimum of 4263 to Maximum of 57699 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | |
| Time of Day: | |
| If countermeasure is intersection-based |
| Intersection Type: | |
| Intersection Geometry: | |
| Traffic Control: | |
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| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details |
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| Date Range of Data Used: | 2001 to 2005 |
| Municipality: | |
| State: | notusa |
| Country: | Korea |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (sites): | 3315 sites |
| Other Details |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 01, 2015 |
| Comments: | |
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