CMF / CRF Details
CMF ID: 2951
Install wide median (>2 m) on major road of a 4-leg signalized intersection (motorcycle crashes)
Description: Install a wide median (i.e. width greater than 2 meters) along the major road of a four-legged signalized intersection (effect on motorcycle crashes)
Prior Condition: No Prior Condition(s)
Category: Access management
Study: Applying Bayesian Hierarchical Models to Examine Motorcycle Crashes at Signalized Intersections, Haque et al., 2010
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 135 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.2 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -20 (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: | 4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 5700 to Maximum of 37520 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 2850 to Maximum of 31270 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 18431 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 14509 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): | 1948 crashes |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 21, 2011 |
| Comments: | Only motorcycle related crashes |
