CMF / CRF Details
CMF ID: 5466
Landscape Medians at Intersections
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
| 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 |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Apr 30, 2014 |
| Comments: | The CMF represents the expected change in crashes for medians without trees compared to medians with trees compliant with Florida’s design standards. The state's design elements include tree setback, tree diameter, tree spacing, tree canopy, and ground cover. |
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