CMF / CRF Details
CMF ID: 4547
10-ft to 60-ft conversion (median width)
Description: Convert a 10-ft traversable median to a 60-ft traversable median
Prior Condition: 10-ft wide traversable median
Category: Access management
Study: Crash Reduction Factors for Traffic Engineering and ITS Improvements, Harkey et al., 2008
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 140 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.56 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.1 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 44 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 10 |
| Applicability | |
|---|---|
| Crash Type: | Cross median |
| Crash Severity: | Not specified |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 5 |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | < = 5 Lanes |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Urban |
| Traffic Volume: | Minimum of 2600 to Maximum of 282000 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | |
| Time of Day: | |
| If countermeasure is intersection-based | |
| Intersection Type: | |
| Intersection Geometry: | |
| Traffic Control: | |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | |
| Municipality: | |
| State: | No state(s) chosen. |
| Country: | |
| Type of Methodology Used: | Regression cross-section |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | Yes |
| Date Added to Clearinghouse: | Dec 01, 2009 |
| Comments: | Full access control |
