CMF / CRF Details
CMF ID: 7822
Convert 12-foot lanes to 9-foot or less
Description: Convert 12-foot lanes to 9-foot or less
Prior Condition: Roadway with 12-foot lanes
Category: Roadway
Study: Validation and Application of Highway Safety Manual (Part D) in Florida, Abdel-Aty et al., 2014
Star Quality Rating: | [View score details] |
Rating Points Total: | 70 |
Crash Modification Factor (CMF) | |
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Value: | 0.62 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.2 |
Crash Reduction Factor (CRF) | |
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Value: | 38 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 20 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
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: | All |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Rural |
Traffic Volume: | Minimum of 103 to Maximum of 56000 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: | 2010 to 2012 |
Municipality: | |
State: | FL |
Country: | USA |
Type of Methodology Used: | Regression cross-section |
Sample Size (crashes): | 269 crashes |
Sample Size (sites): | 970 sites |
Sample Size (site-years): | 2910 site-years |
Sample Size (miles): | 904 miles |
Sample Size (mile-years): | 2712 mile-years |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Mar 08, 2016 |
Comments: | The speed limit here is the average speed limit. |