CMF / CRF Details
CMF ID: 6855
Change horizontal alignment
Description: change horizontal alignment
Prior Condition: Roadway without horizontal curves
Category: Alignment
Study: Is Horizontal Curvature a Significant Factor of Safety in Rural Multilane Highways?, Banihashemi, 2015
Star Quality Rating: | [View score details] |
Rating Points Total: | 75 |
Crash Modification Factor (CMF) | |
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Value: | |
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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: | All |
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: | All |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Rural |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | |
Intersection Geometry: | |
Traffic Control: | |
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Average Minor Road Volume : |
Development Details | |
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Date Range of Data Used: | 2007 to 2009 |
Municipality: | |
State: | WA |
Country: | |
Type of Methodology Used: | Non-regression cross-section |
Sample Size (sites): | 3017 sites |
Sample Size (site-years): | 9051 site-years |
Sample Size (miles): | 212 miles |
Sample Size (mile-years): | 636 mile-years |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Nov 01, 2015 |
Comments: | CMFunction for horizontal curves. CMF=1 for curve radius >=4240ft |