CMF / CRF Details
CMF ID: 2967
Provide a right-turn lane on one major-road approach
Description:
Prior Condition: neither approach of the major road of a 3-leg unsignalized intersection has a right-turn lane
Category: Intersection geometry
Study: Using a Reliability Process to Reduce Uncertainty in Predicting Crashes at Unsignalized Intersections, Haleem et al., 2010
Star Quality Rating: | [View score details] |
Rating Points Total: | 100 |
Crash Modification Factor (CMF) | |
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Value: | 0.8 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.08 |
Crash Reduction Factor (CRF) | |
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Value: | 20 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 8.2 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
Roadway Types: | Not Specified |
Street Type: | |
Minimum Number of Lanes: | |
Maximum Number of Lanes: | |
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: | Not specified |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | 3-leg |
Traffic Control: | Stop-controlled |
Major Road Traffic Volume: | Minimum of 7332 to Maximum of 66171 Annual Average Daily Traffic (AADT) |
Minor Road Traffic Volume: | |
Average Major Road Volume : | |
Average Minor Road Volume : |
Development Details | |
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Date Range of Data Used: | 2003 to 2006 |
Municipality: | Orange County |
State: | FL |
Country: | U.S.A. |
Type of Methodology Used: | Regression cross-section |
Sample Size (crashes): | 497 crashes |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Mar 21, 2011 |
Comments: | Countermeasure name has been slightly modified for consistency across Clearinghouse |