CMF / CRF Details
CMF ID: 4525
10-ft to 20-ft conversion (median width)
Description: Convert a 10-ft traversable median to a 20-ft traversable median
Prior Condition: 10-ft wide traversable median
Category: Access management
Study: Crash Reduction Factors for Traffic Engineering and ITS Improvements, Harkey et al., 2008
Star Quality Rating: | [View score details] |
Rating Points Total: | 140 |
Crash Modification Factor (CMF) | |
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Value: | 0.89 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.04 |
Crash Reduction Factor (CRF) | |
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Value: | 11 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 4 |
Applicability | |
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Crash Type: | Cross median |
Crash Severity: | Not specified |
Roadway Types: | Not specified |
Street Type: | |
Minimum Number of Lanes: | 5 |
Maximum Number of Lanes: | |
Number of Lanes Direction: | |
Number of Lanes Comment: | < = 5 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 2600 to Maximum of 282000 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | |
Time of Day: | |
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: | |
Municipality: | |
State: | No state(s) chosen. |
Country: | |
Type of Methodology Used: | Regression cross-section |
Other Details | |
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Included in Highway Safety Manual? | Yes |
Date Added to Clearinghouse: | Dec 01, 2009 |
Comments: | Full access control. |