CMF / CRF Details
CMF ID: 6160
Conversion of stop-controlled intersection into multi-lane roundabout
Description:
Prior Condition: four-leg intersection with stop control on minor
Category: Intersection geometry
Study: Public Opinion, Traffic Performance, The Environment, and Safety After the Construction of Double-Lane Roundabouts, Hu et al., 2014
Star Quality Rating: | [View score details] |
Rating Points Total: | 60 |
Crash Modification Factor (CMF) | |
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Value: | 6.016 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 3.998 |
Crash Reduction Factor (CRF) | |
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Value: | -501.6 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 399.8 |
Applicability | |
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Crash Type: | All |
Crash Severity: | O (property damage only) |
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: | Undivided |
Minimum Speed Limit: | 50 |
Maximum Speed Limit: | 50 |
Speed Unit: | mph |
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: | No values chosen. |
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: | 2003 to 2007 |
Municipality: | Bellingham |
State: | WA |
Country: | |
Type of Methodology Used: | Regression cross-section |
Sample Size (crashes): | 76 crashes |
Sample Size (sites): | 9 sites |
Sample Size (site-years): | 63 site-years |