CMF / CRF Details
Install red-light cameras at intersections
Countermeasure ID: 9181
Description:
Prior Condition: Intersections without red-light running cameras
Category: Advanced technology and ITS
Study: Effects of Red Light Running Camera Systems Installation and Then Deactivation on Intersection Safety, Ko et al., 2017
| Crash Modification Factor (CMF) |
|---|
| Value: | 1.18 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.16 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | -18 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 16 |
| Applicability |
|---|
| Crash Type: | Other |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| 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: | All |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| If countermeasure is intersection-based |
| Intersection Type: | Not specified |
| Intersection Geometry: | No values chosen. |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details |
|---|
| Date Range of Data Used: | 2004 to 2011 |
| Municipality: | Houston |
| State: | TX |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 13 crashes before, 85 crashes after |
| Sample Size (sites): | 48 sites before, 48 sites after |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jun 17, 2018 |
| Comments: | CMF for rear-end red-light running crashes. |
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