CMF / CRF Details
CMF ID: 11221
Convert Unsignalized Intersection to Mini-Roundabout
Description:
Prior Condition: Two-way stop controlled intersection (TWSC) or one-way stop controlled (OWSC) intersection
Category: Intersection geometry
Study: Mini-Roundabout CMF Development, Pulugurtha et al., 2021
Star Quality Rating: | [View score details] |
Rating Points Total: | 100 |
Crash Modification Factor (CMF) | |
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Value: | 0.83 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.08 |
Crash Reduction Factor (CRF) | |
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Value: | 17 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 8 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
Roadway Types: | All |
Street Type: | Two-Way |
Minimum Number of Lanes: | 2 |
Maximum Number of Lanes: | 4 |
Number of Lanes Direction: | Both Directions |
Number of Lanes Comment: | |
Crash Weather: | All |
Road Division Type: | All |
Minimum Speed Limit: | 25 |
Maximum Speed Limit: | 55 |
Speed Unit: | mph |
Speed Limit Comment: | |
Area Type: | All |
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,4-leg |
Traffic Control: | Stop-controlled |
Major Road Traffic Volume: | Minimum of 1970 to Maximum of 14726 Annual Average Daily Traffic (AADT) |
Minor Road Traffic Volume: | Minimum of 386 to Maximum of 6846 Annual Average Daily Traffic (AADT) |
Average Major Road Volume : | 7762 Annual Average Daily Traffic (AADT) |
Average Minor Road Volume : | 3668 Annual Average Daily Traffic (AADT) |
Development Details | |
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Date Range of Data Used: | 2001 to 2018 |
Municipality: | |
State: | GA,IA,MI,MN,MO,NC,VA,WA |
Country: | USA |
Type of Methodology Used: |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Aug 25, 2022 |
Comments: |