CMF / CRF Details
Landscape Medians at Intersections
Countermeasure ID: 5466
Description: Landscape medians in form of ground cover, plant, or trees.
Prior Condition: Medians with trees compliant with Florida’s design standards
Category: Access management
Study: Landscaping of Highway Medians at Intersections, Lin et al., 2013
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 60 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.68 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.71 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -68 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 71 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 6 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | 2, 4, and 6 Lanes |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | 30 |
| Maximum Speed Limit: | 50 |
| Speed Unit: | mph |
| Speed Limit Comment: | 30 - 50 mph on Major Road / 15 - 30 mph on Minor Road |
| Area Type: | Not specified |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Stop-controlled |
| Major Road Traffic Volume: | Minimum of 4900 to Maximum of 49500 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 2009 to 2010 |
| Municipality: | |
| State: | FL |
| Country: | |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 174 crashes |
