CMF / CRF Details
CMF ID: 10127
Install wider edgelines (4 in to 6 in)
Description:
Widen edgelines from 4 inches to 6 inches
Prior Condition: No Prior Condition(s)
Category: Delineation
Crash Modification Factor (CMF) |
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Value: | 0.765 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.091 |
Crash Reduction Factor (CRF) |
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Value: | 23.53 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 9.14 |
Applicability |
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Crash Type: | Nighttime |
Crash Severity: | K (fatal),A (serious 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: | |
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 2016 |
Municipality: | |
State: | ID |
Country: | USA |
Type of Methodology Used: | Before/after using comparison group |
Other Details |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Jul 26, 2019 |
Comments: | The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development. |