CMF / CRF Details
Presence of driveway on an intersection approach corner
Countermeasure ID: 9739
Description:
Prior Condition: No driveways within 50 feet of any approach corner at a signalized intersection
Category: Access management
Study: Safety Evaluation of Corner Clearance at Signalized Intersections, Le et al., 2018
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 150 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.62 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.13 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 38 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 13 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible 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: | |
| 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: | 4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 10406 to Maximum of 93000 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 500 to Maximum of 48000 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 37945 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 8598 Annual Average Daily Traffic (AADT) |
| Development Details | |
|---|---|
| Date Range of Data Used: | 2009 to 2011 |
| Municipality: | |
| State: | CA,NC |
| Country: | United States |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 1568 crashes |
| Sample Size (sites): | 275 sites |
| Sample Size (site-years): | 825 site-years |
