CMF / CRF Details
CMF ID: 7811
10-ft to 70-ft conversion (median width)
Description: Convert a 10-ft traversable median to a 70-ft traversable median
Prior Condition: Roadways with a 10ft median
Category: Access management
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: | 80 |
Crash Modification Factor (CMF) | |
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Value: | 0.91 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.03 |
Crash Reduction Factor (CRF) | |
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Value: | 9 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 3 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
Roadway Types: | Not specified |
Street Type: | |
Minimum Number of Lanes: | 4 |
Maximum Number of Lanes: | |
Number of Lanes Direction: | |
Number of Lanes Comment: | > = 4 Lanes |
Crash Weather: | Not specified |
Road Division Type: | Divided by Median |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Urban |
Traffic Volume: | Minimum of 18900 to Maximum of 158000 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 (sites): | 143 sites |
Sample Size (site-years): | 429 site-years |
Sample Size (miles): | 123.65 miles |
Sample Size (mile-years): | 372 mile-years |