CMF / CRF Details
CMF ID: 8463
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
Crash Modification Factor (CMF) |
Value: |
0.45
|
Adjusted Standard Error: |
|
Unadjusted Standard Error: |
0.069 |
Crash Reduction Factor (CRF) |
Value: |
55 (This value indicates a decrease in crashes)
|
Adjusted Standard Error: |
|
Unadjusted Standard Error: |
6.9 |
Applicability |
Crash Type: |
All |
Crash Severity: |
K (fatal),A (serious injury),B (minor injury),C (possible injury) |
Roadway Types: |
Not specified |
Number of Lanes: |
2 |
Road Division Type: |
|
Speed Limit: |
|
Area Type: |
Rural |
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: |
|
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): |
58 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 |