CMF / CRF Details
CMF ID: 8464
Install an intersection conflict warning system (ICWS) with post mounted signs (various messages) and flashers in advance of the intersection on major; loop on minor
Description: Install an intersection conflict warning system (ICWS) with post mounted signs (various messages) and flashers in advance of the intersection on major; loop on minor
Prior Condition: No intersection conflict warning systems
Category: Signs
Study: Multi-State Safety Evaluation of Intersection Conflict Warning Systems (ICWS), Himes et al, 2016
Star Quality Rating: | [View score details] |
Rating Points Total: | 132 |
Crash Modification Factor (CMF) | |
---|---|
Value: | 0.454 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.067 |
Crash Reduction Factor (CRF) | |
---|---|
Value: | 54.6 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 6.7 |
Applicability | |
---|---|
Crash Type: | Angle |
Crash Severity: | All |
Roadway Types: | Not specified |
Street Type: | |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 2 |
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: | Rural |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | Not specified |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | 4-leg |
Traffic Control: | Stop-controlled |
Major Road Traffic Volume: | |
Minor Road Traffic Volume: | |
Average Major Road Volume : | |
Average Minor Road Volume : |
Development Details | |
---|---|
Date Range of Data Used: | |
Municipality: | |
State: | MN,MO,NC |
Country: | |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 61 crashes after |
Sample Size (sites): | 14 sites before, 14 sites after |
Other Details | |
---|---|
Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Jan 17, 2017 |
Comments: | CMF for 2-lane at 2-lane intersections |