CMF / CRF Details
CMF ID: 241
Convert intersection with minor-road stop control to modern roundabout
Description:
Prior Condition: No Prior Condition(s)
Category: Intersection geometry
Study: NCHRP Report 572: Applying Roundabouts in the United States, Rodegerdts et al., 2007
Star Quality Rating: | [View score details] |
Rating Points Total: | 75 |
Crash Modification Factor (CMF) | |
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Value: | 0.32 |
Adjusted Standard Error: | 0.14 |
Unadjusted Standard Error: | 0.12 |
Crash Reduction Factor (CRF) | |
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Value: | 68 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | 14 |
Unadjusted Standard Error: | 12 |
Applicability | |
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Crash Type: | All |
Crash Severity: | A (serious injury),B (minor injury),C (possible injury) |
Roadway Types: | Not Specified |
Street Type: | |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 2 |
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: | Suburban |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | 4-leg |
Traffic Control: | Stop-controlled |
Major Road Traffic Volume: | |
Minor Road Traffic Volume: | |
Average Major Road Volume : | |
Average Minor Road Volume : |
Development Details | |
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Date Range of Data Used: | |
Municipality: | |
State: | |
Country: | |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |