CMF / CRF Details
CMF ID: 9274
Flatten horizontal curve
Description:
Prior Condition: Sharper horizontal curves with longer approach and departure tangents.
Category: Alignment
Study: Another look at the safety effects of horizontal curvature on rural two-lane highways, Saleem and Persaud, 2017
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 105 |
| Crash Modification Factor (CMF) | |
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| Value: |  |
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| Applicability | |
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| 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: | 50 |
| Maximum Speed Limit: | 60 |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | Minimum of 207 to Maximum of 19831 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 2147 Annual Average Daily Traffic (AADT) |
| Time of Day: | All |
| If countermeasure is intersection-based | |
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| Development Details | |
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| Date Range of Data Used: | 2005 to 2011 |
| Municipality: | |
| State: | WA |
| Country: | USA |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 2253 crashes |
| Sample Size (sites): | 1550 sites |
| Sample Size (site-years): | 10850 site-years |
| Sample Size (miles): | 680 miles |
| Sample Size (mile-years): | 4760 mile-years |
