CMF / CRF Details
CMF ID: 3925
Lower posted speed from 80 km/h to 60 km/h
Description: Lower speed from 80 km/h to 60 km/h
Prior Condition: Minor rural road speed limit of 80 km/h
Category: Speed management
Study: Making minor rural road networks safer: The effects of 60 km/h-zones, Jaarsma et al., 2011
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 60 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.69 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 31 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
|---|---|
| Crash Type: | Fixed object |
| Crash Severity: | K (fatal) |
| Roadway Types: | Minor Collector |
| 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: | Rural |
| Traffic Volume: | Minimum of 146 to Maximum of 4512 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 752 Annual Average Daily Traffic (AADT) |
| Time of Day: | Not specified |
| 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: | 1992 to 2003 |
| Municipality: | |
| State: | notusa |
| Country: | Netherlands |
| Type of Methodology Used: | Simple before/after |
| Sample Size (crashes): | 91 crashes before, 31 crashes after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jun 04, 2012 |
| Comments: | |
