CMF / CRF Details
CMF ID: 9784
Install concrete guardrail in median
Description:
Prior Condition: Divided highway with open median
Category: Roadside
Study: Barrier-Relevant Crash Modification Factors and Average Crash Costs of Crashes on Arterial Roads in Indiana, Zou and Tarko, 2018
Star Quality Rating: | [View score details] |
Rating Points Total: | 105 |
Crash Modification Factor (CMF) | |
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Value: | 2.68 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.28 |
Crash Reduction Factor (CRF) | |
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Value: | -168 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 28 |
Applicability | |
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Crash Type: | Other |
Crash Severity: | All |
Roadway Types: | Principal Arterial Other Freeways and Expressways |
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: | Divided by Median |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Not specified |
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: | 2008 to 2012 |
Municipality: | |
State: | IN |
Country: | United States |
Type of Methodology Used: | Regression cross-section |
Sample Size (crashes): | 1604 crashes |
Sample Size (sites): | 1258 sites |
Sample Size (site-years): | 6290 site-years |
Sample Size (miles): | 330 miles |
Sample Size (mile-years): | 1650 mile-years |