CMF / CRF Details
CMF ID: 2207
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: | 30 |
Crash Modification Factor (CMF) | |
---|---|
Value: | 0.65 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.106 |
Crash Reduction Factor (CRF) | |
---|---|
Value: | 35 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 10.57 |
Applicability | |
---|---|
Crash Type: | All |
Crash Severity: | All |
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 (site-years): | 2 site-years before, 1 site-years after |
Other Details | |
---|---|
Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Dec 01, 2009 |
Comments: |