CMF / CRF Details
CMF ID: 11290
Lower posted speed
Description:
Prior Condition: No Prior Condition(s)
Category: Speed management
Study: Evaluation of Direct and Indirect Safety Effects of Speed-Limit Reduction on Urban Networks, Seung-oh et al., 2022
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 105 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.9505 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.0308 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 4.95 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 3.08 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible injury) |
| Roadway Types: | All |
| Street Type: | Two-Way |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | Not Specified |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | All |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | km/h |
| Speed Limit Comment: | |
| Area Type: | Not specified |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based | |
| Intersection Type: | |
| Intersection Geometry: | |
| Traffic Control: | |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | |
| Municipality: | |
| State: | notusa |
| Country: | South Korea |
| Type of Methodology Used: | |
