CMF / CRF Details
CMF ID: 5641
Convert traditional mainline toll plazas to hybrid mainline toll plazas
Description:
30 traditional mainline toll plazas in Florida were converted to hybrid mainline toll plazas consisting of a mix of open road tolling and traditional toll collections on the side.
Prior Condition: Traditional mainline toll plazas
Category: Roadway
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.34 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.06 |
| Crash Reduction Factor (CRF) |
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| Value: | 66 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 6 |
| Applicability |
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| Crash Type: | Rear end |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other |
| 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: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | All |
| 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: | 2002 to 2012 |
| Municipality: | |
| State: | FL |
| Country: | United States |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Other Details |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Aug 12, 2014 |
| Comments: | It is not clear if the EB analysis accounted for trends using annual calibration factors or other approaches 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. |
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