CMF / CRF Details
CMF ID: 2943
Replacement of traditional intersection with roundabout with separated cycle path
Description: Installation of a roundabout with a separated cycle path in place of a traditional (signalized or unsignalized) intersection. Study roundabouts were split between priority to bicyclists and no priority to bicyclists in the cycle lanes.
Prior Condition: Traditional signalized or unsignalized intersection
Category: Bicyclists
Study: Injury crashes with bicyclists at roundabouts: influence of some location characteristics and the design of cycle facilities, Daniels et al., 2009
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 40 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.42 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.436 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -42 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 43.6 |
| Applicability | |
|---|---|
| Crash Type: | Vehicle/bicycle |
| Crash Severity: | K (fatal),A (serious injury) |
| 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: | All |
| 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 (not interchange related) |
| Intersection Geometry: | Not specified |
| Traffic Control: | Roundabout |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 1991 to 2001 |
| Municipality: | |
| State: | notusa |
| Country: | Belgium |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (sites): | 38 sites after |
