CMF / CRF Details
CMF ID: 9130
Install cable median barrier
Description: Install cable median barrier
Prior Condition: No Prior Condition(s)
Category: Roadside
Study: Digesting the safety effectiveness of cable barrier systems by numbers, Chimba et al.,, 2017
Star Quality Rating: | [View score details] |
Rating Points Total: | 95 |
Crash Modification Factor (CMF) | |
---|---|
Value: | 0.15 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.01 |
Crash Reduction Factor (CRF) | |
---|---|
Value: | 85 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 1 |
Applicability | |
---|---|
Crash Type: | Other |
Crash Severity: | A (serious injury),B (minor injury),C (possible injury) |
Roadway Types: | All |
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: | 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 | |
---|---|
Date Range of Data Used: | 2003 to 2013 |
Municipality: | |
State: | TN |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 682 crashes before, 257 crashes after |
Sample Size (sites): | 577 sites before, 577 sites after |
Sample Size (site-years): | 1731 site-years before, 1731 site-years after |
Sample Size (miles): | 302 miles before, 302 miles after |
Sample Size (miles): | 906 mile-years before, 906 mile-years after |
Other Details | |
---|---|
Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Jan 17, 2018 |
Comments: | Median related crashes. |