CMF / CRF Details
Install guiderail
Countermeasure ID: 10309
Description: None
Prior Condition: No Prior Condition(s)
Category: Roadside
Study: Reducing Roadway Departure Crashes at Horizontal Curve Sections on Two-lane Rural Highways, Donnell et al., 2019
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.723 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.152 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 27.7 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 15.2 |
| Applicability |
|---|
| Crash Type: | All |
| 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: | Not specified |
| Road Division Type: | Undivided |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | Minimum of 703 to Maximum of 16808 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 4757 Annual Average Daily Traffic (AADT) |
| 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: | 2009 to 2013 |
| Municipality: | |
| State: | IN,PA |
| Country: | |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 53 crashes |
| Sample Size (sites): | 87 sites |
| Sample Size (miles): | 17.31 miles |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 23, 2020 |
| Comments: | This CMF is for crashes on Horizontal Curves. |
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