CMF / CRF Details
CMF ID: 2210
Reverse X-ramp exit and entry ramps
Description: Improvements included eliminating 2 entrance ramps, reversing 1 exit ramp, reversing 1 entrance ramp, adding an auxiliary lane, and 2 interesction improvements.
Prior Condition: No Prior Condition(s)
Category: Interchange design
Study: Evaluation of Operational, Safety and Basic Economic Impacts of Ramp Reversal Projects, Cooner and Rathod, 2008
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 10 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.33 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.382 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 67 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 38.25 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | K (fatal),A (serious injury) |
| Roadway Types: | Principal Arterial Interstate |
| Street Type: | |
| Minimum Number of Lanes: | 8 |
| Maximum Number of Lanes: | 8 |
| 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: | Roadway/roadway (interchange ramp terminal) |
| 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: | 2000 to 2002 |
| Municipality: | |
| State: | TX |
| Country: | |
| Type of Methodology Used: | Simple before/after |
| Sample Size (sites): | 1 sites after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 01, 2009 |
| Comments: | |
