CMF / CRF Details
CMF ID: 6400
Change horizontal alignment
Description:
change horizontal alignment
Prior Condition: Roadway segment is straight section
Category: Alignment
Crash Modification Factor (CMF) |
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Value: | 2.94 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 1.25 |
Crash Reduction Factor (CRF) |
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Value: | -194 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 125 |
Applicability |
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Crash Type: | Run off road |
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: | 50 |
Speed Unit: | mph |
Speed Limit Comment: | 80 km/h converted to 50 km/h |
Area Type: | Rural |
Traffic Volume: | Minimum of 0 to Maximum of 30000 Annual Average Daily Traffic (AADT) |
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 |
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Date Range of Data Used: | 2004 to 2008 |
Municipality: | Drenthe and Gelderland |
State: | notusa |
Country: | Netherlands |
Type of Methodology Used: | Regression cross-section |
Sample Size (crashes): | 324 crashes |
Sample Size (sites): | 7347 sites |
Sample Size (site-years): | 36735 site-years |
Sample Size (miles): | 457 miles |
Sample Size (mile-years): | 2285 mile-years |
Other Details |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Jun 22, 2015 |
Comments: | This CMF applies to strong horizontal curves, compared to straight sections, which are not further defined. |