CMF / CRF Details
Install uncontrolled left-turn lane on major road of a signalized T intersection (motorcycle crashes)
Countermeasure ID: 2958
Description: Install uncontrolled left-turn lane on the major road of a signalized T intersection (effect on motorcycle crashes)
Prior Condition: No Prior Condition(s)
Category: Intersection geometry
Study: Applying Bayesian Hierarchical Models to Examine Motorcycle Crashes at Signalized Intersections, Haque et al., 2010
| Crash Modification Factor (CMF) |
|---|
| Value: | 1.4 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) |
|---|
| Value: | -40 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability |
|---|
| Crash Type: | All |
| 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: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based |
| Intersection Type: | Not specified |
| Intersection Geometry: | 3-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 4800 to Maximum of 30270 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 2550 to Maximum of 25010 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 15489 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 10447 Annual Average Daily Traffic (AADT) |
| Development Details |
|---|
| Date Range of Data Used: | 2003 to 2006 |
| Municipality: | |
| State: | notusa |
| Country: | Singapore |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 400 crashes |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 21, 2011 |
| Comments: | Only motorcycle related crashes |
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